Emails going to spam

This is the most common deliverability issue. Fix by configuring:

1. SPF record — add TXT record to your DNS: v=spf1 include:_spf.google.com ~all (replace include with your SMTP provider's SPF)
2. DKIM — generate a DKIM key in your SMTP provider's dashboard, add as TXT record
3. DMARC — add TXT record _dmarc.your-domain.com: v=DMARC1; p=none; rua=mailto:postmaster@your-domain.com
4. Use a real "From" address on your own domain (not gmail.com)
5. Warm up new domains gradually — send 50 emails/day first week, ramp up slowly

"SMTP connection failed"

• Firewall may be blocking port 587/465 outbound — test with: telnet smtp.gmail.com 587
• Use TLS (port 587) not SSL (port 465) for Gmail — Gmail deprecated SSL
• Double-check credentials. For Gmail, you need an App Password, not your regular password

Some emails send, others do not

Usually a rate-limit issue:

• Gmail limits: 500/day for free accounts, 2,000/day for Workspace
• Brevo free tier: 300/day, then silently queues or drops
• Check your SMTP provider dashboard for rate limit / bounce stats

Email Logs show "Sent" but nothing arrives

• Check recipient's Spam / Promotions / Junk folder
• Test with a different email address (different domain)
• Use mail-tester.com to score your email deliverability
• If score < 8/10, fix the issues listed (SPF, DKIM, DMARC, reply-to, subject-line spam triggers)

Welcome email not sent on signup

• Check Admin → Email Logs → filter by "welcome"
• If no log entry, the signup hook is not firing — check Admin → Settings → Email → "Send welcome email" toggle
• If log shows "Failed": SMTP is misconfigured. Click Send Test Email in Email settings to diagnose.