https://warminboxes.com/reviews/aj-cassata-revenue-boost https://i.ytimg.com/vi/vKruruEpFrc/hqdefault.jpg AJ Cassata's video review of WarmInboxes AJ Cassata, Founder of Revenue Boost, shares how Warm Inboxes helped transform their cold email campaigns and boost client results. https://www.youtube.com/embed/vKruruEpFrc 58 2026-04-07 yes https://warminboxes.com/reviews/leevi-agency-velocity https://i.ytimg.com/vi/QjPc4jfTo9g/hqdefault.jpg Leevi's video review of WarmInboxes Leevi, founder of Agency Velocity, shares how Warm Inboxes provides the easiest way to launch cold email campaigns. https://www.youtube.com/embed/QjPc4jfTo9g 90 2026-01-05 yes https://warminboxes.com/reviews/naufal-understory https://i.ytimg.com/vi/pffm5jr1gEY/hqdefault.jpg Naufal's video review of WarmInboxes Naufal, Head GTM Engineer at Understory, shares how Warm Inboxes helped optimize their go-to-market email strategy. https://www.youtube.com/embed/pffm5jr1gEY 39 2026-03-19 yes https://warminboxes.com/reviews/phil-sergenti-mailfirst https://i.ytimg.com/vi/PT7b3J1oAxM/hqdefault.jpg Phil Sergenti's video review of WarmInboxes Phil Sergenti, Founder of MailFirst, shares how Warm Inboxes provides the infrastructure foundation that powers his cold email campaigns for VC-backed B2B companies. https://www.youtube.com/embed/PT7b3J1oAxM 70 2026-05-20 yes https://warminboxes.com/reviews/josiah-ansu-agency-advanta https://i.ytimg.com/vi/uXXdO5lNigo/hqdefault.jpg Josiah Ansu's video review of WarmInboxes Josiah Ansu, Founder of Agency Advanta, on four years of running client cold email on WarmInboxes prewarmed and fresh inboxes across around 400 B2B clients. https://www.youtube.com/embed/uXXdO5lNigo 251 2026-08-12 yes https://warminboxes.com/reviews/emmanuel-plnitude https://i.ytimg.com/vi/6Be_oJvVNSk/hqdefault.jpg Emmanuel's video review of WarmInboxes Emmanuel, founder of PLNitude, explains how Upscale's cold email infrastructure helped him acquire new clients consistently. https://www.youtube.com/embed/6Be_oJvVNSk 77 2025-09-12 yes https://warminboxes.com/reviews/harry https://i.ytimg.com/vi/JVY0bpOMTtE/hqdefault.jpg Harry's video review of WarmInboxes Harry gives Upscale a perfect 10/10 rating and explains why he'd recommend their services. https://www.youtube.com/embed/JVY0bpOMTtE 51 2025-09-12 yes https://warminboxes.com/reviews/ernesto-vilagut https://i.ytimg.com/vi/FNmS9brtwd0/hqdefault.jpg Ernesto Vilagut's video review of WarmInboxes Ernesto Vilagut shares his experience with WarmInboxes prewarmed inboxes and the results his cold email campaigns saw after switching. https://www.youtube.com/embed/FNmS9brtwd0 38 2026-06-17 yes https://warminboxes.com/reviews/diyor-eleon-acquisition https://i.ytimg.com/vi/bfazqlcRUtE/hqdefault.jpg Diyor's video review of WarmInboxes Diyor from Eleon Acquisition shares how WarmInboxes powers the cold email infrastructure behind their client acquisition campaigns. https://www.youtube.com/embed/bfazqlcRUtE 32 2026-06-24 yes https://warminboxes.com/reviews/jakub https://i.ytimg.com/vi/7icDa3fjf78/hqdefault.jpg Jakub's video review of WarmInboxes Jakub shares his results with WarmInboxes prewarmed inboxes and what working with the team has been like. https://www.youtube.com/embed/7icDa3fjf78 39 2026-07-01 yes https://warminboxes.com/reviews/papa-leveraged-outbound https://i.ytimg.com/vi/v0wlIhiWha8/hqdefault.jpg Papa's video review of WarmInboxes Papa, founder of Leveraged Outbound, shares how Warm Inboxes saved them from losing clients when their infrastructure was completely burned. https://www.youtube.com/embed/v0wlIhiWha8 33 2025-12-10 yes https://warminboxes.com/reviews/ryan-growth-circle https://i.ytimg.com/vi/2OONP9l3694/hqdefault.jpg Ryan's video review of WarmInboxes Ryan, founder of Growth Circle, explains how Upscale's solution saved his team countless hours while improving their cold email results. https://www.youtube.com/embed/2OONP9l3694 101 2025-09-12 yes https://warminboxes.com/reviews/sabrina-marketplace https://i.ytimg.com/vi/rrr6KF5_bs4/hqdefault.jpg Sabrina's video review of WarmInboxes Sabrina discusses how Upscale helped her marketplace reach their target audience and acquire new clients. https://www.youtube.com/embed/rrr6KF5_bs4 47 2025-09-12 yes https://warminboxes.com/reviews/louis-castelli https://i.ytimg.com/vi/SPx6caFCL-U/hqdefault.jpg Louis's video review of WarmInboxes Louis, founder of Castelli Soun, shares his positive experience working with the Upscale team and the results they delivered. https://www.youtube.com/embed/SPx6caFCL-U 23 2025-09-12 yes https://warminboxes.com/reviews/jagbir https://i.ytimg.com/vi/eG_kgvNMoWM/hqdefault.jpg Jagbir's video review of WarmInboxes Jagbir discusses how Upscale consistently overdelivered on their promises and exceeded expectations. https://www.youtube.com/embed/eG_kgvNMoWM 38 2025-09-12 yes https://warminboxes.com/reviews/hariate https://i.ytimg.com/vi/2E4X-Ca2E2M/hqdefault.jpg Hariate's video review of WarmInboxes Hariate shares how Upscale helped set up cold email infrastructure that consistently generates new clients. https://www.youtube.com/embed/2E4X-Ca2E2M 53 2025-09-12 yes https://warminboxes.com/reviews/jake https://i.ytimg.com/vi/QRoVDy3MgnU/hqdefault.jpg Jake's video review of WarmInboxes Jake shares how Warm Inboxes helped him generate £78,918 worth of quotes through cold email outreach. https://www.youtube.com/embed/QRoVDy3MgnU 2025-09-12 yes https://warminboxes.com/reviews/artem-growiq https://i.ytimg.com/vi/A262gXmDjaI/hqdefault.jpg Artem's video review of WarmInboxes Artem, founder of GrowIQ, explains how he optimised his agency operation by leveraging Warm Inboxes' stellar support and infrastructure. https://www.youtube.com/embed/A262gXmDjaI 66 2026-01-05 yes https://warminboxes.com/reviews/hussien-al-hirz https://i.ytimg.com/vi/dv67TRAr0qk/hqdefault.jpg Hussien Al Hirz's video review of WarmInboxes Hussien shares his experience with the exceptional support provided by the team. https://www.youtube.com/embed/dv67TRAr0qk 16 2026-01-20 yes https://warminboxes.com/reviews/robert https://i.ytimg.com/vi/Rg99NBZKyqc/hqdefault.jpg Robert's video review of WarmInboxes Robert shares his positive experience with the prewarmed inboxes and how they impacted his cold email campaigns. https://www.youtube.com/embed/Rg99NBZKyqc 43 2026-02-12 yes https://warminboxes.com/reviews/goodness-revenue-boost https://i.ytimg.com/vi/I3R72ulGUIs/hqdefault.jpg Goodness's video review of WarmInboxes Goodness from Revenue Boost shares how Warm Inboxes helped boost their revenue through effective cold email outreach. https://www.youtube.com/embed/I3R72ulGUIs 21 2026-01-27 yes https://warminboxes.com/reviews/will-carecraft https://i.ytimg.com/vi/B9gvFGDHUeU/hqdefault.jpg Will's video review of WarmInboxes Will, founder of Carecraft Media, discusses how prewarmed inboxes from Upscale revolutionized their client outreach strategy. https://www.youtube.com/embed/B9gvFGDHUeU 52 2026-02-17 yes https://warminboxes.com/reviews/adam-startup-accelerator https://i.ytimg.com/vi/DOkfnOIf7sY/hqdefault.jpg Adam's video review of WarmInboxes Adam from Startup Accelerator shares his experience with Upscale and how it has been amazing for their outreach efforts. https://www.youtube.com/embed/DOkfnOIf7sY 46 2025-09-12 yes https://warminboxes.com/reviews/nick-coreconversions https://i.ytimg.com/vi/bgmOyWD6Bzs/hqdefault.jpg Nick's video review of WarmInboxes Nick of CoreConversions talks through why the agency runs its cold email on WarmInboxes prewarmed inboxes. https://www.youtube.com/embed/bgmOyWD6Bzs 71 2026-08-19 yes https://warminboxes.com/reviews/otavio-creatormonetize https://i.ytimg.com/vi/4nhZrtxNwPw/hqdefault.jpg Otavio's video review of WarmInboxes Otavio of CreatorMonetize on using WarmInboxes prewarmed inboxes for the outreach behind the business. https://www.youtube.com/embed/4nhZrtxNwPw 38 2026-08-26 yes https://warminboxes.com/reviews/can-google-prewarmed https://i.ytimg.com/vi/b7Qy1hi7BIc/hqdefault.jpg Can's video review of WarmInboxes Can talks about his experience sending cold email from Google prewarmed inboxes supplied by WarmInboxes. https://www.youtube.com/embed/b7Qy1hi7BIc 26 2026-09-02 yes https://warminboxes.com/reviews/greg-deliverability-system https://i.ytimg.com/vi/znWmNjt1-F0/hqdefault.jpg Greg's video review of WarmInboxes Greg talks through the WarmInboxes deliverability system and running cold email on prewarmed Google Workspace and Azure inboxes. https://www.youtube.com/embed/znWmNjt1-F0 36 2026-09-30 yes https://warminboxes.com/reviews/justin-glover-ai-scale-tips https://i.ytimg.com/vi/76YlmGO8uOY/hqdefault.jpg Justin Glover's video review of WarmInboxes Justin Glover, founder of AI Scale Tips, on building newsletters with cold email sent from WarmInboxes inboxes. https://www.youtube.com/embed/76YlmGO8uOY 2026-11-05 yes https://warminboxes.com/videos/blacklist-checker https://i.ytimg.com/vi/fV0A56W_vAs/hqdefault.jpg Is Your Domain Blacklisted? Check 20 Blacklists Free A 60-second walkthrough of the free Warm Inboxes blacklist checker: paste a domain or IP, see every major blacklist it appears on, and find out what to do about a listing before it costs you a campaign. https://www.youtube.com/embed/fV0A56W_vAs 2026-10-17 yes https://warminboxes.com/videos/deliverability-checker https://i.ytimg.com/vi/ycCvwzote5Q/hqdefault.jpg Grade Your Email Deliverability A to F (Free Tool) A 60-second walkthrough of the free Warm Inboxes deliverability checker: grade any sending domain A to F across SPF, DKIM, DMARC, MX, blacklists and domain age, and see exactly which record is dragging the score down. https://www.youtube.com/embed/ycCvwzote5Q 2026-10-17 yes https://warminboxes.com/videos/spam-checker https://i.ytimg.com/vi/s89hcDIUY5M/hqdefault.jpg Will Your Cold Email Land in Spam? Free Spam Checker A short walkthrough of the free Warm Inboxes spam checker: paste a subject and body, see the weighted spam triggers it finds, and fix them before the send. https://www.youtube.com/embed/s89hcDIUY5M 2026-10-17 yes https://warminboxes.com/videos/esp-segmenter https://i.ytimg.com/vi/ZDt3smZM8Dw/hqdefault.jpg Split Your Lead List by Google vs Outlook (Free) A short walkthrough of the free Warm Inboxes ESP segmentation tool: upload a lead list, split it by Google, Microsoft and gateway inboxes, and see how many mailboxes each segment needs. https://www.youtube.com/embed/ZDt3smZM8Dw 2026-10-17 yes https://warminboxes.com/videos/calculator https://i.ytimg.com/vi/RMnnJ3Oa5Zk/hqdefault.jpg How Many Cold Email Inboxes Do You Need? A short walkthrough of the free Warm Inboxes infrastructure calculator: enter a daily send target and get the number of inboxes and domains it takes, with the monthly cost. https://www.youtube.com/embed/RMnnJ3Oa5Zk 2026-10-17 yes https://warminboxes.com/videos/nameserver-checker https://i.ytimg.com/vi/t-9N9Omodsk/hqdefault.jpg Free Nameserver Checker: Find Any Domain's DNS Host A short walkthrough of the free Warm Inboxes nameserver checker: look up the NS records for one domain or a whole CSV and see which DNS host each one points at. https://www.youtube.com/embed/t-9N9Omodsk 2026-10-17 yes https://warminboxes.com/videos/surbl-checker https://i.ytimg.com/vi/6wVwWWGfFsI/hqdefault.jpg Are the Links in Your Emails Blacklisted? SURBL Check A short walkthrough of the free Warm Inboxes SURBL checker: bulk-check the domains in your links against the SURBL URI blocklist before they cost you a campaign. https://www.youtube.com/embed/6wVwWWGfFsI 2026-10-17 yes https://warminboxes.com/videos/google-domain-checker https://i.ytimg.com/vi/Prw0h0SVwd8/hqdefault.jpg Can This Domain Use Google Workspace? Check Free A short walkthrough of the free Warm Inboxes Google domain checker: see whether a domain is already tied to a Google Workspace account before you try to sign it up. https://www.youtube.com/embed/Prw0h0SVwd8 2026-10-17 yes https://warminboxes.com/videos/email-verifier https://i.ytimg.com/vi/zZ4fySjPKH8/hqdefault.jpg Free Email Verifier: Is This Address Real? A short walkthrough of the free Warm Inboxes email verifier: paste addresses and see which are valid, risky or invalid from syntax, MX, disposable and role checks. https://www.youtube.com/embed/zZ4fySjPKH8 2026-10-17 yes https://warminboxes.com/videos/record-generator https://i.ytimg.com/vi/EV3fzj--jW4/hqdefault.jpg Generate SPF, DKIM and DMARC Records in Seconds A short walkthrough of the free Warm Inboxes record generator: pick your sending platform and get correct SPF, DKIM and DMARC records to paste into DNS. https://www.youtube.com/embed/EV3fzj--jW4 2026-10-17 yes https://warminboxes.com/videos/domain-expiry-checker https://i.ytimg.com/vi/uFOZqnqHZII/hqdefault.jpg Domain Expiry Checker: Don't Lose Your Sending Domains A short walkthrough of the free Warm Inboxes domain expiry checker: check the expiration dates on your sending domains and catch a renewal before it lapses. https://www.youtube.com/embed/uFOZqnqHZII 2026-10-17 yes https://warminboxes.com/videos/dns-checker https://i.ytimg.com/vi/IN8EKYEhj7k/hqdefault.jpg Free DNS Checker: MX, TXT, CNAME and A Records A short walkthrough of the free Warm Inboxes DNS checker: query MX, TXT, CNAME, A and the other record types for any domain in one lookup. https://www.youtube.com/embed/IN8EKYEhj7k 2026-10-17 yes https://warminboxes.com/videos/dkim-checker https://i.ytimg.com/vi/pNZiy93NOv0/hqdefault.jpg Free DKIM Checker: Is Your Email Actually Signed? A short walkthrough of the free Warm Inboxes DKIM checker: scan the common selectors for a domain and validate the signing key it publishes. https://www.youtube.com/embed/pNZiy93NOv0 2026-10-17 yes https://warminboxes.com/videos/spf-checker https://i.ytimg.com/vi/WxUTIRPxSm0/hqdefault.jpg Free SPF Checker: Stop Your SPF Record Breaking Email A short walkthrough of the free Warm Inboxes SPF checker: look up a domain’s SPF record, count its DNS lookups against the limit, and see what would break it. https://www.youtube.com/embed/WxUTIRPxSm0 2026-10-17 yes https://warminboxes.com/videos/dmarc-checker https://i.ytimg.com/vi/zrJfgnAr56c/hqdefault.jpg Free DMARC Checker: Is Your DMARC Record Working? A short walkthrough of the free Warm Inboxes DMARC checker: validate a domain’s DMARC record, read its policy and tags, and see what the verdicts mean. https://www.youtube.com/embed/zrJfgnAr56c 2026-10-17 yes https://warminboxes.com/videos/email-provider-checker https://i.ytimg.com/vi/eaRBQqQGB3Y/hqdefault.jpg Who Hosts Their Email? Free Email Provider Checker A short walkthrough of the free WarmInboxes email provider checker: enter a domain and see whether its mail is hosted by Google, Microsoft, another provider or behind a security gateway. https://www.youtube.com/embed/eaRBQqQGB3Y 2026-11-05 yes https://warminboxes.com/videos/tracking-domain-checker https://i.ytimg.com/vi/8fVzrO1441c/hqdefault.jpg Is Your Tracking Domain Hurting Deliverability? A short walkthrough of the free WarmInboxes tracking domain checker: see where a custom tracking domain points and whether it is set up the way your sequencer expects. https://www.youtube.com/embed/8fVzrO1441c 2026-11-05 yes https://warminboxes.com/videos/dkim-selector-finder https://i.ytimg.com/vi/hAJ_EHIrweU/hqdefault.jpg Don't Know Your DKIM Selector? Find It Free A short walkthrough of the free WarmInboxes DKIM selector finder: enter a domain and it tries the common selectors to find which DKIM keys are published. https://www.youtube.com/embed/hAJ_EHIrweU 2026-11-05 yes https://warminboxes.com/videos/spf-lookup-counter https://i.ytimg.com/vi/0GBpCsHo79c/hqdefault.jpg Is Your SPF Record About to Break? Free Lookup Counter A short walkthrough of the free WarmInboxes SPF lookup counter: count the DNS lookups an SPF record triggers against the limit of ten, include by include. https://www.youtube.com/embed/0GBpCsHo79c 2026-11-05 yes https://warminboxes.com/videos/email-authentication-checker https://i.ytimg.com/vi/VSsoSJXjzoI/hqdefault.jpg Check SPF, DKIM, DMARC, BIMI and MTA-STS in One Pass A short walkthrough of the free WarmInboxes email authentication checker: SPF, DKIM, DMARC, BIMI and MTA-STS for one domain in a single pass, with the optional records marked optional. https://www.youtube.com/embed/VSsoSJXjzoI 2026-11-05 yes https://warminboxes.com/videos/dmarc-alignment-checker https://i.ytimg.com/vi/4j6k3m8iB88/hqdefault.jpg SPF and DKIM Passed. So Why Did DMARC Fail? A short walkthrough of the free WarmInboxes DMARC alignment checker: see why a message can pass SPF and DKIM and still fail DMARC when the domains do not align. https://www.youtube.com/embed/4j6k3m8iB88 2026-11-05 yes https://warminboxes.com/videos/dmarc-report-analyzer https://i.ytimg.com/vi/VU79qRQupdA/hqdefault.jpg Read Your DMARC Reports in Plain English (Free) A short walkthrough of the free WarmInboxes DMARC report analyzer: paste an aggregate report and read which sources sent as your domain and which of them passed. https://www.youtube.com/embed/VU79qRQupdA 2026-11-05 yes https://warminboxes.com/videos/email-link-scanner https://i.ytimg.com/vi/Lb_5TpCO9VU/hqdefault.jpg Is One Link Getting Your Cold Email Blocked? A short walkthrough of the free WarmInboxes email link scanner: paste an email and check every link in it, so one listed domain does not take the whole message down. https://www.youtube.com/embed/Lb_5TpCO9VU 2026-11-05 yes https://warminboxes.com/videos/gmail-clipping-checker https://i.ytimg.com/vi/MQSLwo2Ah18/hqdefault.jpg Is Gmail Clipping Your Emails? Free 102KB Check A short walkthrough of the free WarmInboxes Gmail clipping checker: measure an email's HTML against the 102KB point where Gmail clips the message. https://www.youtube.com/embed/MQSLwo2Ah18 2026-11-05 yes https://warminboxes.com/videos/one-click-unsubscribe-checker https://i.ytimg.com/vi/Cl4oArLkMxA/hqdefault.jpg Is Your Unsubscribe Really One Click? Check Free A short walkthrough of the free WarmInboxes one-click unsubscribe checker: read a message's headers and confirm the List-Unsubscribe and List-Unsubscribe-Post headers bulk senders need. https://www.youtube.com/embed/Cl4oArLkMxA 2026-11-05 yes https://warminboxes.com/videos/bulk-sender-requirements-checker https://i.ytimg.com/vi/kApvUjfp4Ag/hqdefault.jpg Do You Meet Gmail's Bulk Sender Rules? Check Free A short walkthrough of the free WarmInboxes bulk sender requirements checker: test a domain against the Gmail and Yahoo bulk sender rules for authentication, DMARC and unsubscribe. https://www.youtube.com/embed/kApvUjfp4Ag 2026-11-05 yes https://warminboxes.com/videos/ip-reputation-checker https://i.ytimg.com/vi/WBqwMZPHipw/hqdefault.jpg Is your sending IP on a blocklist? IP Reputation Checker A short walkthrough of the free WarmInboxes IP reputation checker: look up a sending IP on the public blocklists and its reverse DNS, without an invented reputation score. https://www.youtube.com/embed/WBqwMZPHipw 2026-11-05 yes https://warminboxes.com/videos/domain-reputation-checker https://i.ytimg.com/vi/GHIDbPceaWY/hqdefault.jpg Is your domain the problem ? Domain Reputation Checker A short walkthrough of the free WarmInboxes domain reputation checker: the public signals for a sending domain in one view, from blocklists to authentication and age. https://www.youtube.com/embed/GHIDbPceaWY 2026-11-05 yes https://warminboxes.com/videos/mta-sts-checker https://i.ytimg.com/vi/3FI10mtNgOY/hqdefault.jpg Free MTA-STS Checker: Validate Policy and TLS-RPT A short walkthrough of the free WarmInboxes MTA-STS checker: validate a domain's MTA-STS record, its policy file and its TLS-RPT reporting address. https://www.youtube.com/embed/3FI10mtNgOY 2026-11-05 yes https://warminboxes.com/videos/cname-checker https://i.ytimg.com/vi/kxB_X8qRvro/hqdefault.jpg Is Your Tracking Domain Broken? Free CNAME Checker A short walkthrough of the free WarmInboxes CNAME checker: see where a hostname's CNAME points, so a tracking domain that resolves nowhere is caught before a campaign. https://www.youtube.com/embed/kxB_X8qRvro 2026-11-05 yes https://warminboxes.com/videos/bimi-checker https://i.ytimg.com/vi/LLc-mUQXryg/hqdefault.jpg Get Your Logo in the Inbox: Free BIMI Checker A short walkthrough of the free WarmInboxes BIMI checker: read a domain's BIMI record, its logo and its certificate, and the DMARC policy BIMI depends on. https://www.youtube.com/embed/LLc-mUQXryg 2026-11-05 yes https://warminboxes.com/videos/header-analyzer https://i.ytimg.com/vi/yCKNxY4eu3I/hqdefault.jpg Free Email Header Analyzer: SPF, DKIM, DMARC Explained A short walkthrough of the free WarmInboxes email header analyzer: paste a message's headers and read its SPF, DKIM and DMARC results and the route it took. https://www.youtube.com/embed/yCKNxY4eu3I 2026-11-05 yes https://warminboxes.com/videos/inbox-previewer https://i.ytimg.com/vi/wiPfJVwEIPA/hqdefault.jpg See How Your Email Looks in Gmail and Outlook A short walkthrough of the free WarmInboxes inbox previewer: see how a subject, preview text and sender name show in Gmail and Outlook before it is sent. https://www.youtube.com/embed/wiPfJVwEIPA 2026-11-05 yes https://warminboxes.com/videos/unsubscribe-generator https://i.ytimg.com/vi/gpYwhWyCrGo/hqdefault.jpg Free CAN-SPAM and GDPR Unsubscribe Footer Generator A short walkthrough of the free WarmInboxes unsubscribe footer generator: build an opt-out footer with the address and wording CAN-SPAM and GDPR expect. https://www.youtube.com/embed/gpYwhWyCrGo 2026-11-05 yes https://warminboxes.com/videos/csv-combiner https://i.ytimg.com/vi/6tvfs4lbSFg/hqdefault.jpg Merge Multiple Lead Lists Into One (Free CSV Combiner) A short walkthrough of the free WarmInboxes CSV combiner: merge several lead lists into one file with matched columns and duplicates removed, in the browser. https://www.youtube.com/embed/6tvfs4lbSFg 2026-11-05 yes https://warminboxes.com/videos/sequencer-csv-converter https://i.ytimg.com/vi/8Q6mr9STHHw/hqdefault.jpg Convert Lead CSVs: Instantly, Smartlead, Email Bison A short walkthrough of the free WarmInboxes sequencer CSV converter: map a lead list's columns to the format Instantly, Smartlead or Email Bison imports. https://www.youtube.com/embed/8Q6mr9STHHw 2026-11-05 yes https://warminboxes.com/videos/waterfall-calculator https://i.ytimg.com/vi/DMR1Qp99fTM/hqdefault.jpg Cut Email Verification Costs: Waterfall Calculator A short walkthrough of the free WarmInboxes verification waterfall calculator: work out what a list costs to verify when each pass only checks what the last one could not. https://www.youtube.com/embed/DMR1Qp99fTM 2026-11-05 yes https://warminboxes.com/videos/scl-analyzer https://i.ytimg.com/vi/1RbaBb2P0C8/hqdefault.jpg Why Is Outlook Sending Your Email to Junk? A short walkthrough of the free WarmInboxes SCL analyzer: paste Microsoft message headers and read the spam confidence level and the filtering verdicts behind a junked email. https://www.youtube.com/embed/1RbaBb2P0C8 2026-11-05 yes https://warminboxes.com/videos/bounce-analyzer https://i.ytimg.com/vi/E9r2kpQpRIw/hqdefault.jpg Why Did Your Email Bounce? Free Bounce Analyzer A short walkthrough of the free WarmInboxes bounce analyzer: paste a bounce message and see whether it was hard or soft, what caused it and what to do next. https://www.youtube.com/embed/E9r2kpQpRIw 2026-11-05 yes https://warminboxes.com/videos/pre-send-checker https://i.ytimg.com/vi/5DZEx_llQZA/hqdefault.jpg Pre-Send Checker: Catch Campaign Errors Before Launch A short walkthrough of the free WarmInboxes pre-send checker: audit a campaign's copy, volume and settings for the errors that are cheapest to fix before launch. https://www.youtube.com/embed/5DZEx_llQZA 2026-11-05 yes https://warminboxes.com/videos/inbox-planner https://i.ytimg.com/vi/1kWCNmrbR9o/hqdefault.jpg How Many Domains Do You Need for Cold Email? A short walkthrough of the free WarmInboxes inbox planner: work out the domains and inboxes a sending volume needs at a safe daily pace per inbox. https://www.youtube.com/embed/1kWCNmrbR9o 2026-11-05 yes https://warminboxes.com/videos/spintax-tester https://i.ytimg.com/vi/5ZHUMC5YKE8/hqdefault.jpg Free Spintax Tester: Preview Every Email Variation A short walkthrough of the free WarmInboxes spintax tester: check spintax for broken brackets and preview the variations a template produces. https://www.youtube.com/embed/5ZHUMC5YKE8 2026-11-05 yes