Stephen Ingram: > Reading through some very old posts on the list it seems as though, > although not very popular, it is possible to perform authentication in > Postfix using GSSAPI. Setting up the keytab for the smtpd server seems > straightforward enough, however, I'm unsure what to do when it comes > to the smtp or lmtp client. I'm guessing that these services would > require tickets to connect to another postfix instance or mail store > like cyrus-imap, but there doesn't seem to be a way to obtain those > tickets. Is something like a cron job for user postfix that obtains a > ticket from an accessible keytab the best way to go or does Postfix > have some other built-in means to kinit for the tickets?
Postfix does not implement GSSAPI. Postfix does not implement SASL, either. Postfix proxies commands and responses between a remote host and a local SASL implementation *outside Postfix*. The SASL implementation does all the GSSAPI stuff. Your question is therefore best directed at the SASL provider's documentation. Wietse