The mail adapter enables you to connect e-mail servers to the Integration Server or the PCK.
The receiver mail adapter converts XI messages to e-mails and uses the Simple Mail Transfer Protocol (SMTP) or the Internet Message Access Protocol (IMAP) to transfer them to the e-mail server.
The sender mail adapter uses the Internet Message Access Protocol (IMAP) or the Post Office Protocol Version 3 (POP3) to collect e-mails and convert them to XI messages.
If an e-mail server is communicating with the mail adapter, you can configure security settings to encrypt/decrypt and sign/verify messages. Here, message security is based on the S/MIME internet standard (Secure Multipurpose Internet Mail Extension).
For FAQs about the mail adapter, see SAP Note 856599 .
The parameters that you have to enter for the adapter depend on the Direction you want the adapter to have (sender/receiver).