[ { "slug": "2048-bit-dkim", "question": "2048-bit DKIM", "questionFull": "Do I need 2048-bit DKIM?", "answer": "no", "verdict": "NO", "qualifier": "1024 is fine", "lean": null, "excerpt": "Bigger keys sound safer, but 1024-bit DKIM is RFC-compliant, accepted by every major mailbox provider, and satisfies every bulk-sender requirement. 2048 buys you DNS headaches, not deliverability.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/do-i-need-2048-dkim", "url": "https://doineed.email/2048-bit-dkim", "markdownUrl": "https://doineed.email/2048-bit-dkim.md" }, { "slug": "accessible-emails", "question": "accessible emails", "questionFull": "Do I need accessible emails?", "answer": "yes", "verdict": "YES", "qualifier": null, "lean": null, "excerpt": "Of 376,348 emails analyzed in 2026, eight passed every accessibility check. The fixes are small and mechanical—and they serve screen readers, dark mode, bright sunlight, and the agents now reading mail on humans' behalf.", "learnMoreUrl": "https://resend.com/blog/6-tips-for-accessible-emails", "url": "https://doineed.email/accessible-emails", "markdownUrl": "https://doineed.email/accessible-emails.md" }, { "slug": "amp-for-email", "question": "AMP for email", "questionFull": "Do I need AMP for email?", "answer": "no", "verdict": "NO", "qualifier": "cool demo, tiny reach", "lean": null, "excerpt": "Interactive email sounds like the future, but AMP is effectively a Gmail-only format that requires sender registration, a third MIME part, and a fallback that does the real work anyway.", "learnMoreUrl": "https://developers.google.com/gmail/ampemail", "url": "https://doineed.email/amp-for-email", "markdownUrl": "https://doineed.email/amp-for-email.md" }, { "slug": "bimi", "question": "BIMI", "questionFull": "Do I need BIMI?", "answer": "no", "verdict": "NO", "qualifier": "nice to have", "lean": null, "excerpt": "BIMI puts your logo next to your emails, which is lovely branding—and does nothing for deliverability. It also quietly requires the thing that does matter: an enforcing DMARC policy.", "learnMoreUrl": "https://resend.com/blog/email-changes-for-bimi", "url": "https://doineed.email/bimi", "markdownUrl": "https://doineed.email/bimi.md" }, { "slug": "bounce-and-complaint-rates", "question": "to watch my bounce and complaint rates", "questionFull": "Do I need to watch my bounce and complaint rates?", "answer": "yes", "verdict": "YES", "qualifier": "the two numbers that matter", "lean": null, "excerpt": "Bounces under 4%, complaints under 0.08%—these two numbers are how mailbox providers grade you, and they move before your open rates do. Watch them like uptime.", "learnMoreUrl": "https://resend.com/docs/dashboard/emails/deliverability-insights", "url": "https://doineed.email/bounce-and-complaint-rates", "markdownUrl": "https://doineed.email/bounce-and-complaint-rates.md" }, { "slug": "bulk-sender-requirements", "question": "to comply with the bulk sender requirements", "questionFull": "Do I need to comply with the bulk sender requirements?", "answer": "yes", "verdict": "YES", "qualifier": "law at 5,000 a day", "lean": null, "excerpt": "Since 2024, Gmail, Yahoo, Microsoft, and Apple enforce the same baseline on bulk senders: full authentication, one-click unsubscribe, complaints under 0.3%. Below the threshold you're graded on it anyway.", "learnMoreUrl": "https://resend.com/blog/gmail-and-yahoo-bulk-sending-requirements-for-2024", "url": "https://doineed.email/bulk-sender-requirements", "markdownUrl": "https://doineed.email/bulk-sender-requirements.md" }, { "slug": "click-tracking", "question": "click tracking", "questionFull": "Do I need click tracking?", "answer": "depends", "verdict": "IT DEPENDS", "qualifier": "the reliable half", "lean": "yes", "excerpt": "Unlike opens, a click is a real human act—it's the engagement number you can actually trust. The cost: your links get rewritten, so do it on your own domain or not at all.", "learnMoreUrl": "https://resend.com/docs/dashboard/domains/tracking", "url": "https://doineed.email/click-tracking", "markdownUrl": "https://doineed.email/click-tracking.md" }, { "slug": "custom-return-path", "question": "a custom return path", "questionFull": "Do I need a custom return path?", "answer": "yes", "verdict": "YES", "qualifier": "the default is fine", "lean": null, "excerpt": "Your ESP already sets a working, aligned Return-Path on a subdomain it manages—deliverability-wise you're covered. Customize it when branding or a picky security review demands it.", "learnMoreUrl": "https://resend.com/docs/dashboard/domains/custom-return-path", "url": "https://doineed.email/custom-return-path", "markdownUrl": "https://doineed.email/custom-return-path.md" }, { "slug": "custom-tracking-domain", "question": "a custom tracking domain", "questionFull": "Do I need a custom tracking domain?", "answer": "yes", "verdict": "YES", "qualifier": "if tracking is on", "lean": null, "excerpt": "Tracking links default to a domain you share with strangers—and their reputation becomes yours. If you track opens or clicks, the redirect domain should be one you own.", "learnMoreUrl": "https://resend.com/blog/introducing-custom-tracking-domain", "url": "https://doineed.email/custom-tracking-domain", "markdownUrl": "https://doineed.email/custom-tracking-domain.md" }, { "slug": "dedicated-ip", "question": "a dedicated IP", "questionFull": "Do I need a dedicated IP?", "answer": "depends", "verdict": "IT DEPENDS", "qualifier": "most likely no", "lean": "no", "excerpt": "If you have to ask, you probably don't. Dedicated IPs pay off for senders with high, steady volume and deliverability expertise—everyone else inherits a cold IP and a warming project.", "learnMoreUrl": "https://resend.com/blog/do-you-need-a-dedicated-ip", "url": "https://doineed.email/dedicated-ip", "markdownUrl": "https://doineed.email/dedicated-ip.md" }, { "slug": "dkim", "question": "DKIM", "questionFull": "Do I need DKIM?", "answer": "yes", "verdict": "YES", "qualifier": null, "lean": null, "excerpt": "DKIM is your cryptographic signature—proof the message came from you and wasn't altered in transit. Every major provider expects it, and DMARC is hollow without it.", "learnMoreUrl": "https://resend.com/blog/email-authentication-a-developers-guide", "url": "https://doineed.email/dkim", "markdownUrl": "https://doineed.email/dkim.md" }, { "slug": "dkim-rotation", "question": "to rotate my DKIM keys", "questionFull": "Do I need to rotate my DKIM keys?", "answer": "no", "verdict": "NO", "qualifier": "unless a key leaks", "lean": null, "excerpt": "Routine DKIM rotation is security theater for most senders—your ESP manages the keys, and a broken rotation hurts more than a stale key ever did. Compromise is the exception: rotate immediately.", "learnMoreUrl": null, "url": "https://doineed.email/dkim-rotation", "markdownUrl": "https://doineed.email/dkim-rotation.md" }, { "slug": "dmarc", "question": "DMARC", "questionFull": "Do I need DMARC?", "answer": "yes", "verdict": "YES", "qualifier": "at least p=none", "lean": null, "excerpt": "Every serious mailbox provider now expects a DMARC policy on your domain. Publishing p=none costs nothing, breaks nothing, and shows you exactly who is sending as you.", "learnMoreUrl": "https://resend.com/docs/dashboard/domains/dmarc", "url": "https://doineed.email/dmarc", "markdownUrl": "https://doineed.email/dmarc.md" }, { "slug": "dmarc-p-reject", "question": "p=reject", "questionFull": "Do I need p=reject?", "answer": "depends", "verdict": "IT DEPENDS", "qualifier": "earn it first", "lean": "yes", "excerpt": "Reject is where DMARC actually protects your domain—but publish it before every legitimate sender passes and aligns, and you'll block your own mail. Monitor, fix, then enforce.", "learnMoreUrl": "https://resend.com/blog/dmarc-policy-modes", "url": "https://doineed.email/dmarc-p-reject", "markdownUrl": "https://doineed.email/dmarc-p-reject.md" }, { "slug": "dmarc-reports", "question": "to read my DMARC reports", "questionFull": "Do I need to read my DMARC reports?", "answer": "ideally", "verdict": "IDEALLY", "qualifier": "rua, at minimum", "lean": null, "excerpt": "Publishing DMARC without reading the reports is buying a smoke alarm and never checking the battery. The aggregate reports are where misconfigured senders and spoofers show up first.", "learnMoreUrl": "https://resend.com/blog/how-to-read-a-dmarc-report", "url": "https://doineed.email/dmarc-reports", "markdownUrl": "https://doineed.email/dmarc-reports.md" }, { "slug": "domain-reputation", "question": "to worry about domain reputation", "questionFull": "Do I need to worry about domain reputation?", "answer": "yes", "verdict": "YES", "qualifier": null, "lean": null, "excerpt": "Domain reputation is the score that actually decides inbox placement—it reflects what you send and how people react, and it follows you across every provider, platform, and IP.", "learnMoreUrl": "https://resend.com/blog/6-steps-to-improve-your-sender-reputation-score", "url": "https://doineed.email/domain-reputation", "markdownUrl": "https://doineed.email/domain-reputation.md" }, { "slug": "domain-warmup", "question": "to warm up my domain", "questionFull": "Do I need to warm up my domain?", "answer": "yes", "verdict": "YES", "qualifier": null, "lean": null, "excerpt": "A brand-new domain has no reputation, and inbox providers distrust strangers who shout. Ramp volume gradually—and re-warm whenever your provider, IP, or volume changes significantly.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/warming-up", "url": "https://doineed.email/domain-warmup", "markdownUrl": "https://doineed.email/domain-warmup.md" }, { "slug": "double-opt-in", "question": "double opt-in", "questionFull": "Do I need double opt-in?", "answer": "ideally", "verdict": "IDEALLY", "qualifier": null, "lean": null, "excerpt": "Nothing proves consent like a click in a confirmation email. It's not legally required everywhere, but it keeps bots, typos, and grudges off your list—most lists are better with it.", "learnMoreUrl": "https://resend.com/blog/how-to-properly-get-email-consent", "url": "https://doineed.email/double-opt-in", "markdownUrl": "https://doineed.email/double-opt-in.md" }, { "slug": "email-verification", "question": "email verification", "questionFull": "Do I need email verification?", "answer": "ideally", "verdict": "IDEALLY", "qualifier": "at the edges", "lean": null, "excerpt": "Verify at the boundaries: a check at signup keeps typos and bots out, and a cleaning pass before mailing an old list saves your bounce rate. A pristine double-opt-in list needs neither.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/audience-hygiene", "url": "https://doineed.email/email-verification", "markdownUrl": "https://doineed.email/email-verification.md" }, { "slug": "gmail-postmaster-tools", "question": "Gmail Postmaster Tools", "questionFull": "Do I need Gmail Postmaster Tools?", "answer": "yes", "verdict": "YES", "qualifier": "if you send bulk to Gmail", "lean": null, "excerpt": "It's free, it's first-party, and it's the only way to see your domain reputation the way Gmail sees it. If Gmail matters to your list, sign up before you need it.", "learnMoreUrl": "https://support.google.com/a/answer/9981691", "url": "https://doineed.email/gmail-postmaster-tools", "markdownUrl": "https://doineed.email/gmail-postmaster-tools.md" }, { "slug": "idempotency-keys", "question": "idempotency keys", "questionFull": "Do I need idempotency keys?", "answer": "ideally", "verdict": "IDEALLY", "qualifier": "if your code retries", "lean": null, "excerpt": "Networks fail mid-request and retries are how you cope—but a retried send without an idempotency key is how a customer gets three copies of one receipt. One header makes retries safe.", "learnMoreUrl": "https://resend.com/blog/engineering-idempotency-keys", "url": "https://doineed.email/idempotency-keys", "markdownUrl": "https://doineed.email/idempotency-keys.md" }, { "slug": "ip-reputation", "question": "to worry about IP reputation", "questionFull": "Do I need to worry about IP reputation?", "answer": "depends", "verdict": "IT DEPENDS", "qualifier": "your ESP worries for you", "lean": "no", "excerpt": "On a shared pool, IP reputation is your provider's job—and providers weigh the IP less every year anyway. It becomes your problem the day you take a dedicated IP.", "learnMoreUrl": "https://resend.com/blog/do-you-need-a-dedicated-ip", "url": "https://doineed.email/ip-reputation", "markdownUrl": "https://doineed.email/ip-reputation.md" }, { "slug": "my-own-mail-server", "question": "my own mail server", "questionFull": "Do I need my own mail server?", "answer": "no", "verdict": "NO", "qualifier": "please, no", "lean": null, "excerpt": "Running Postfix in production means owning IP reputation, blocklists, TLS, key rotation, feedback loops, and 3 a.m. deliverability archaeology—to rebuild a commodity. Keep SMTP, drop the server.", "learnMoreUrl": "https://resend.com/blog/why-smtp-still-matters-today", "url": "https://doineed.email/my-own-mail-server", "markdownUrl": "https://doineed.email/my-own-mail-server.md" }, { "slug": "no-reply-address", "question": "a no-reply address", "questionFull": "Do I need a no-reply address?", "answer": "no", "verdict": "NO", "qualifier": "replies are a feature", "lean": null, "excerpt": "noreply@ tells recipients and mailbox providers the same thing: this conversation only goes one way. Providers count replies as engagement, and Microsoft now requires sender addresses that actually work.", "learnMoreUrl": "https://resend.com/docs/dashboard/emails/deliverability-insights", "url": "https://doineed.email/no-reply-address", "markdownUrl": "https://doineed.email/no-reply-address.md" }, { "slug": "one-click-unsubscribe", "question": "one-click unsubscribe", "questionFull": "Do I need one-click unsubscribe?", "answer": "yes", "verdict": "YES", "qualifier": "if you send bulk", "lean": null, "excerpt": "Send 5,000+ emails a day to Gmail or Yahoo and RFC 8058 one-click unsubscribe headers are mandatory, not optional. Below that, they're still the cheapest complaint-rate insurance available.", "learnMoreUrl": "https://resend.com/blog/gmail-and-yahoo-bulk-sending-requirements-for-2024", "url": "https://doineed.email/one-click-unsubscribe", "markdownUrl": "https://doineed.email/one-click-unsubscribe.md" }, { "slug": "open-tracking", "question": "open tracking", "questionFull": "Do I need open tracking?", "answer": "depends", "verdict": "IT DEPENDS", "qualifier": "not for transactional", "lean": "no", "excerpt": "The pixel lies: privacy proxies fire false opens, image blocking hides real ones, and inbox providers read trackers as a promotional smell. Fine for marketing trends, off for transactional.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/why-are-my-open-rates-not-accurate", "url": "https://doineed.email/open-tracking", "markdownUrl": "https://doineed.email/open-tracking.md" }, { "slug": "physical-address", "question": "a physical address in my footer", "questionFull": "Do I need a physical address in my footer?", "answer": "depends", "verdict": "IT DEPENDS", "qualifier": "probably yes", "lean": "yes", "excerpt": "For marketing email to US recipients, CAN-SPAM requires a valid physical postal address—and other jurisdictions have their own versions. Purely transactional mail is generally exempt.", "learnMoreUrl": "https://www.ftc.gov/business-guidance/resources/can-spam-act-compliance-guide-business", "url": "https://doineed.email/physical-address", "markdownUrl": "https://doineed.email/physical-address.md" }, { "slug": "plain-text-version", "question": "a plain-text version", "questionFull": "Do I need a plain-text version?", "answer": "ideally", "verdict": "IDEALLY", "qualifier": "cheap insurance", "lean": null, "excerpt": "HTML-only mail usually lands fine—but the multipart text version costs nothing and quietly serves watches, screen readers, strict clients, and cautious filters. Cheapest robustness win in email.", "learnMoreUrl": null, "url": "https://doineed.email/plain-text-version", "markdownUrl": "https://doineed.email/plain-text-version.md" }, { "slug": "preference-center", "question": "a preference center", "questionFull": "Do I need a preference center?", "answer": "ideally", "verdict": "IDEALLY", "qualifier": "topics beat goodbyes", "lean": null, "excerpt": "A lone unsubscribe link is all-or-nothing: one unwanted promo and you lose the reader entirely—or worse, they hit the spam button. Topic-level preferences turn goodbyes into downgrades.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/why-use-topics", "url": "https://doineed.email/preference-center", "markdownUrl": "https://doineed.email/preference-center.md" }, { "slug": "sending-subdomain", "question": "a subdomain for sending", "questionFull": "Do I need a subdomain for sending?", "answer": "yes", "verdict": "YES", "qualifier": null, "lean": null, "excerpt": "Send from notifications.acme.com, not acme.com. Subdomains isolate reputation damage and tell inbox providers what each mail stream is for—while your root domain stays clean.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/is-it-better-to-send-emails-from-a-subdomain-or-the-root-domain", "url": "https://doineed.email/sending-subdomain", "markdownUrl": "https://doineed.email/sending-subdomain.md" }, { "slug": "signup-form-protection", "question": "to protect my signup forms", "questionFull": "Do I need to protect my signup forms?", "answer": "yes", "verdict": "YES", "qualifier": null, "lean": null, "excerpt": "An unprotected signup form is an open API for polluting your own list—bots stuff it with garbage, and list-bombers weaponize it against victims. CAPTCHA, honeypots, and rate limits are cheap armor.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/audience-hygiene", "url": "https://doineed.email/signup-form-protection", "markdownUrl": "https://doineed.email/signup-form-protection.md" }, { "slug": "spam-checkers", "question": "to trust spam-score checkers", "questionFull": "Do I need to trust spam-score checkers?", "answer": "no", "verdict": "NO", "qualifier": "mostly", "lean": null, "excerpt": "A 10/10 on mail-tester doesn't mean the inbox—score checkers and seed tests can't see the thing that actually decides placement: your reputation and how your recipients engage.", "learnMoreUrl": "https://resend.com/blog/why-your-emails-are-going-to-spam", "url": "https://doineed.email/spam-checkers", "markdownUrl": "https://doineed.email/spam-checkers.md" }, { "slug": "spam-trigger-words", "question": "to avoid \"spam trigger words\"", "questionFull": "Do I need to avoid \"spam trigger words\"?", "answer": "no", "verdict": "NO", "qualifier": "mostly a myth", "lean": null, "excerpt": "No secret list of forbidden words decides your fate. Modern filters weigh reputation, authentication, and engagement—\"FREE!!!\" in a subject line is a style crime, not a spam sentence.", "learnMoreUrl": "https://resend.com/blog/why-your-emails-are-going-to-spam", "url": "https://doineed.email/spam-trigger-words", "markdownUrl": "https://doineed.email/spam-trigger-words.md" }, { "slug": "spf", "question": "SPF", "questionFull": "Do I need SPF?", "answer": "yes", "verdict": "YES", "qualifier": null, "lean": null, "excerpt": "SPF is table stakes. It's a single DNS record telling mailbox providers which servers may send for your domain—and every major provider expects to find it.", "learnMoreUrl": "https://resend.com/blog/email-authentication-a-developers-guide", "url": "https://doineed.email/spf", "markdownUrl": "https://doineed.email/spf.md" }, { "slug": "sunset-policy", "question": "a sunset policy", "questionFull": "Do I need a sunset policy?", "answer": "yes", "verdict": "YES", "qualifier": "six quiet months", "lean": null, "excerpt": "Recipients who stopped engaging drag down the metrics providers grade you on—and eventually decay into bounces and complaints. Re-engage them once, then let them go.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/audience-hygiene", "url": "https://doineed.email/sunset-policy", "markdownUrl": "https://doineed.email/sunset-policy.md" }, { "slug": "suppression-list", "question": "a suppression list", "questionFull": "Do I need a suppression list?", "answer": "yes", "verdict": "YES", "qualifier": "your ESP runs one", "lean": null, "excerpt": "A suppression list is the memory that stops you from re-mailing addresses that bounced or complained—the two fastest ways to burn a domain. Good ESPs run one natively; your job is to respect it.", "learnMoreUrl": "https://resend.com/docs/dashboard/emails/email-suppressions", "url": "https://doineed.email/suppression-list", "markdownUrl": "https://doineed.email/suppression-list.md" }, { "slug": "throttling", "question": "to throttle my sending", "questionFull": "Do I need to throttle my sending?", "answer": "depends", "verdict": "IT DEPENDS", "qualifier": "mostly handled for you", "lean": "no", "excerpt": "Blasting a day's volume in one burst is a classic self-inflicted wound— providers read spikes as spam behavior. But pacing is mostly your ESP's job; your job is the schedule.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/warming-up", "url": "https://doineed.email/throttling", "markdownUrl": "https://doineed.email/throttling.md" }, { "slug": "to-buy-an-email-list", "question": "to buy an email list", "questionFull": "Do I need to buy an email list?", "answer": "no", "verdict": "NO", "qualifier": "never", "lean": null, "excerpt": "Bought lists are consent-free by definition—spam traps, stale addresses, and people who've never heard of you. There is no faster way to torch a domain reputation.", "learnMoreUrl": "https://resend.com/blog/how-to-properly-get-email-consent", "url": "https://doineed.email/to-buy-an-email-list", "markdownUrl": "https://doineed.email/to-buy-an-email-list.md" }, { "slug": "unsubscribe-link", "question": "an unsubscribe link", "questionFull": "Do I need an unsubscribe link?", "answer": "yes", "verdict": "YES", "qualifier": "for anything promotional", "lean": null, "excerpt": "Marketing and nurture email must carry a visible way out—law and inbox providers agree. Transactional mail is exempt, but hiding the exit is how you earn spam complaints.", "learnMoreUrl": "https://resend.com/docs/knowledge-base/should-i-add-an-unsubscribe-link", "url": "https://doineed.email/unsubscribe-link", "markdownUrl": "https://doineed.email/unsubscribe-link.md" }, { "slug": "warmup-service", "question": "a warmup service", "questionFull": "Do I need a warmup service?", "answer": "no", "verdict": "NO", "qualifier": null, "lean": null, "excerpt": "Warmup is real; warmup services aren't. Synthetic opens and scripted replies are detectable, meaningless to inbox providers, and can actively damage the reputation they claim to build.", "learnMoreUrl": "https://resend.com/blog/do-you-need-a-warmup-service", "url": "https://doineed.email/warmup-service", "markdownUrl": "https://doineed.email/warmup-service.md" } ]