Hi,

I am running the latest container image which has dovecot-submissiond 2:2.3.20-3+debian11

I am running into the following problem. I have successfully set up xoauth2 for IMAP and ManageSieve.

Now when roundcube tries to send email to submissiond it fails with 500 5.5.2 Line too long

This happens right after roundcube sends AUTH XOAUTH2 dXNlcj10ZkBzY2hhZWZmZXItYWcu[...] (a line of length 2149 characters).

Reading RFC 4954, section 4 I suppose that this does not look standard compliant. Am I correct? I will raise this issue with roundcube as well.

Cheers, Tobi