Email Troubleshooting Guide - Cannot Send or Receive Print

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Comprehensive Email Troubleshooting

This guide addresses common email issues including send/receive problems, blacklisting, and configuration errors.

Important: Your assigned mail server hostname for POP3/IMAP/SMTP can be found in your Plesk control panel under Websites & Domains > your domain > Mail Accounts > the info icon. See: Where can I Locate my Mail Server Settings?

Do NOT use adaptivewebmail.com as your mail server — that is the webmail interface only (browser access at https://adaptivewebmail.com).

Issue 1: Cannot Receive Emails

Check MX Records:

  1. In Plesk, go to Websites & Domains > DNS Settings
  2. Verify MX record exists and points to your mail server
  3. MX priority should be 10 (lower = higher priority)

Check Mailbox Status:

  1. Go to Mail > select your domain
  2. Verify the email account exists and is active
  3. 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 Your assigned Mail Server Hostname (found in Plesk)
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:

  1. In Plesk, go to Mail > Mail Settings
  2. Enable DKIM spam protection
  3. Plesk automatically creates DNS records

Add DMARC Record:

_dmarc.yourdomain.com TXT "v=DMARC1; p=quarantine; rua=mailto:[email protected]"

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:

  1. Identify and stop any spam being sent from your account
  2. Contact support - we can submit delisting requests
  3. Review compromised accounts or scripts

Issue 5: Webmail Not Working

Access 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:

  1. Go to Mail > select email account
  2. Click Forwarding tab
  3. Enable forwarding and enter destination address
  4. Choose whether to keep copy locally

Email Client Settings (Quick Reference)

Protocol Server Port Encryption
IMAP Your assigned Mail Server Hostname 993 SSL/TLS
POP3 Your assigned Mail Server Hostname 995 SSL/TLS
SMTP Your assigned Mail Server Hostname 587 or 465 TLS or SSL

Note: Always use encrypted connections (SSL/TLS) for security. Find your assigned mail server hostname in Plesk under Websites & Domains > Mail Accounts. The webmail interface at https://adaptivewebmail.com is for browser-based access only — it is NOT the mail server address for email clients.


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