Submission auth gssapi: line too long

Carlos Mogas da Silva r3pek at
Sun Aug 14 17:42:39 UTC 2022

Hey guys.

Dovecot is complaining about a "Line too long" when the clients send the AUTH command with GSSAPI
authentication. Known bug?

# dovecot --version (9b53102964)

This is right after the EHLO command (which is after STARTTLS):
[1]: No more commands pending
[1]: Sending replies
[1]: No more commands pending
[1]: Client sent invalid command: Command line is too long
[1]: command [unknown]: Invalid command
[1]: command [unknown]: 500 reply: Submitted
[1]: command [unknown]: Replied
[1]: command [unknown]: Ready to reply
[1]: Trigger output
[1]: Sending replies
[1]: command [unknown]: Next to reply
[1]: command [unknown]: Completed
[1]: command [unknown]: 500 reply: Sent: 500 5.5.2 Line too long
[1]: command [unknown]: Finished
[1]: command [unknown]: Destroy
[1]: command [unknown]: 500 reply: Destroy
[1]: Trigger output

More information about the dovecot mailing list