Prompt
Why are my verification emails not reaching the inbox?
Latest observation
Oct 5, 2026
OpenAI APIWeb search: off
Verification emails can miss the inbox for a few common reasons:
Common causes
- Spam/junk filtering: The message may be landing in spam, promotions, or other filtered folders.
- Sender reputation issues: If your email domain or sending IP has a poor reputation, inbox providers may block or filter it.
- Authentication not set up: Missing or incorrect SPF, DKIM, or DMARC records can cause delivery problems.
- Blocked or invalid recipient address: The user’s mailbox may reject the email, or the address may be mistyped.
- Content triggers: Subject lines, links, or wording can look suspicious to spam filters.
- Rate limiting / volume spikes: Sending too many emails too quickly can cause inbox providers to defer or filter them.
- Email provider delays: Some providers throttle or temporarily delay messages.
- Domain / IP blacklisting: The sending IP or domain may be listed on a blocklist.
- Verification flow issues: The app may not be triggering the send correctly, or tokens/links may be expiring before use.
What to check
- Look in spam/junk/promotions folders.
- Verify SPF, DKIM, and DMARC are correctly configured.
- Check your sending service logs for bounces, rejects, or deferrals.
- Confirm the recipient email address is correct.
- Review the email content for spammy wording or too many links.
- Test with a few different mailbox providers (Gmail, Outlook, Yahoo).
- Check whether your sending domain or IP is on any blocklists.
- Make sure verification links/tokens are valid long enough.
If you want, I can help you troubleshoot it step by step.
If you share:
- your sending provider,
- the email domain you’re sending from,
- and any bounce/error logs,
I can narrow down the likely cause quickly.