Comprehensive Email Troubleshooting
This guide addresses common email issues including send/receive problems, blacklisting, and configuration errors.
Issue 1: Cannot Receive Emails
Check MX Records:
- In Plesk, go to Websites & Domains > DNS Settings
- Verify MX record exists and points to your mail server
- MX priority should be 10 (lower = higher priority)
Check Mailbox Status:
- Go to Mail > select your domain
- Verify the email account exists and is active
- Check mailbox quota - full mailboxes reject new mail
Check Mail Service Status:
- Ensure mail service is enabled for your domain
- In Plesk: Websites & Domains > Mail Settings
- Verify "Mail service" is active (green checkmark)
Issue 2: Cannot Send Emails
SMTP Authentication Settings:
| Setting | Value |
|---|---|
| SMTP Server | mail.yourdomain.com |
| Port (TLS) | 587 |
| Port (SSL) | 465 |
| Authentication | Required (full email as username) |
| Encryption | TLS/STARTTLS or SSL |
Common Sending Issues:
- Authentication failed: Use full email address as username
- Connection refused: Check firewall, try different port
- Relay denied: Ensure SMTP authentication is enabled
Issue 3: Emails Going to Spam
Configure SPF Record:
Add TXT record to DNS:
v=spf1 +a +mx +ip4:YOUR_SERVER_IP ~all
Enable DKIM Signing:
- In Plesk, go to Mail > Mail Settings
- Enable DKIM spam protection
- Plesk automatically creates DNS records
Add DMARC Record:
_dmarc.yourdomain.com TXT "v=DMARC1; p=quarantine; rua=mailto:admin@yourdomain.com"
Issue 4: Server IP Blacklisted
Check Blacklist Status:
- Use mxtoolbox.com/blacklists.aspx
- Enter your domain or server IP
- Review which blacklists (if any) list your IP
Resolution Steps:
- Identify and stop any spam being sent from your account
- Contact support - we can submit delisting requests
- Review compromised accounts or scripts
Issue 5: Webmail Not Working
Access Webmail:
- URL: webmail.yourdomain.com
- Or through Plesk: Mail > click email address > Open Webmail
Login Problems:
- Use full email address as username
- Reset password in Plesk if needed
- Clear browser cache and cookies
Issue 6: Email Forwarding Not Working
Set Up Forwarding in Plesk:
- Go to Mail > select email account
- Click Forwarding tab
- Enable forwarding and enter destination address
- Choose whether to keep copy locally
Email Client Settings (Quick Reference)
| Protocol | Server | Port | Encryption |
|---|---|---|---|
| IMAP | mail.yourdomain.com | 993 | SSL/TLS |
| POP3 | mail.yourdomain.com | 995 | SSL/TLS |
| SMTP | mail.yourdomain.com | 587 or 465 | TLS or SSL |
Note: Always use encrypted connections (SSL/TLS) for security.