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SMTP

The SMTP (Simple Mail Transfer Protocol) is the protocol to configure when creating and setting up an email management server (sending). Its default port is 25.

To receive emails on a client (such as Thunderbird or Outlook), the following protocols can be used:

  • IMAP4: Allows viewing and making changes directly on the mail server from the client. Only message headers are downloaded. Its default port is 143.
  • POP3: Downloads a copy of messages to the computer. This allows working without an internet connection, but a connection is needed to sync new messages. It communicates on port 110.