What this solves
You can’t send or receive email. This guide covers the main causes and fixes.
Can’t send
Check: correct SMTP server (e.g. mail.yourdomain.com), port (465 or 587), and “use SSL/TLS.” Username: full email; password: correct. If “authentication failed,” credentials or port are wrong. Check SPF so receiving servers accept mail from your server. See “How to set up email (SPF/DKIM).”
Can’t receive
Check: MX records point to the correct mail server (e.g. mail.yourdomain.com or our mail host). Use an MX lookup tool. If MX is wrong, fix DNS. Ensure the mailbox exists in cPanel and isn’t over quota.
Blacklisted / spam
If mail goes to spam, set up SPF, DKIM, and optionally DMARC. See “How to fix emails going to spam.”
When to contact support
If settings are correct but mail still fails, we can check server logs and reputation.
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