Covering questions about hosting your own email server.

• How do I check if my email server is working?
  (104311 views)
  
  
• My ISP blocks SMTP port 25. Can I still host a mail server?
  (76002 views)
  
  
• How do I setup my DNS to support Sender Policy Framework(SPF)?
  (13624 views)
• How to setup DNS to have an email server (MX) for my domain?
  (61156 views)