Search Knowledge Base Articles

Email Server Requirements

Requirements: 

Internet Service Provider (ISP) with fixed IP.
  • Assigned fixed IP 12.34.56.78
  • No fixed IPv6 address
  • Check Blacklist through Network Tools: DNS,IP,Email (mxtoolbox.com)
    • If Blacklisted, then follow the directions to get delisted from the 3rd party site.
  • Setup Email Server
    • Use a fresh install of Ubuntu/Debian Server
    • Add Mailcow-dockerized from this site:  Installation - mailcow: dockerized documentation
    • Setup accounts according to strict rules
      • Strict rules: 
        • allow smtp port 25 to/from server only and block all others 
        • email users should use ports 465 or 587 to send
        • allow IMAP for special cases / POP3 for normal users that use Outlook
Business & Personal Use:

Business accounts provide the public with contact information that can be easily shared without privacy concerns.

Personal accounts should be kept private.  
  • Implement security:
    • DMARC / SPF / Sending Rate / Allow IMAP or POP3 / TLS Sending / Remove SSLv2 and use only TLS1.2 or better.
    • Monitor RSPAM to allow/reject

Did you find this article useful?

Related Articles

  • E-Mail Server Reputation Score

    It is important to keep checking the status of the e-mail server reputation.  There are a numbe...

  • Bounced E-mail

    Bounced e-mails can hurt the smtp server reputation.  There are two types of bounces.Soft-Bounc...

  • SMTP Relay

    Setup SMTP Relay for additional security and sustain IP reputationBe sure to check the Relay Server ...