poste.io2

Example client settings

SMTP

  • host: mail.example.com
  • port: 587 (465 alternatively)
  • SSL/TLS with authentication required
  • username is whole email address username@example.com
**Do not use port 25** at all as it is reserved for communication for remote mailservers only. Even if it will work you might be affected by unnecessary connection testing and various slowdowns. Some ISPs also blocks customers outbound connections to 25 due fighting with SPAM so it might be impossible to connect to your mailserver from various places. Connections to port 587 are mostly tolerated.
By default "From" header is checked → outgoing email address should be set same as username. (or you can toggle check at administration per account)

IMAP (preferred)

  • host: mail.example.com
  • port: 993
  • SSL/TLS
  • username is whole email address username@example.com

or POP3

  • host: mail.example.com
  • port: 995
  • SSL/TLS
  • username is whole email address username@example.com