This has probably been done to death but is there still a bug in IMAP email?
Running SCRM 8.9 on RHEL 9.6.
Outbound email works fine.
Inbound email will not connect to IMAP and SASL Auth has been installed and the workaround in these forums has also been added (use \SASL_Auth and SASL.php has been included).
No connection attempts from SCRM in the mail server log (it is on-premise).
Cheers,
PF