Hey all, I've run Roundcube here for years, still on version 1.5.2. I've run into a recent issue that I can't figure out. When trying to send an email, SMTP Error -1 pops up. I can read email just fine. I've verified that $config['smtp_port'] = 587 is correctly set and that this port is working on my system. Dedicated mail clients (iOS, Thunderbird) can send mail correctly.
I've looked in /var/log/maillog, /var/log/dovecot.log, /var/log/messages, none of these show anything at all logged when I attempt to send the email.
System is Rocky Linux 8.7, SELinux is enabled. I suspect that SELinux 'might' be a factor but can't confirm. I've found a number of older posts and articles elsewhere on fixing this, but nothing in those was relevant or helpful. I found a forum post here about nothing being logged for a similar issue with no replies.
I know my version isn't current and I'll definitely be looking to update this but would prefer to fix this issue before moving on so as not to complicate the issue. Unless it's a known issue with my version...
Any help here would be greatly appreciated.