I have the exact same problem. It started yesterday, when I upgraded (via rebuild) to 2.9.0.beta4 (a5779a7d0b). I made NO changes to app.yml, or anything else. Just a rebuild.
I now have over 1,300 failed jobs.
I’m seeing SSL errors in the logs (see below for screenshots), and I’m wondering if the rebuild is suddenly ignoring the DISCOURSE_SMTP_ENABLE_START_TLS flag?
This is what I’ve “always” had in my app.yml file: (again, no changes have been made)
DISCOURSE_SMTP_ADDRESS: 172.17.0.1
DISCOURSE_SMTP_PORT: 25
DISCOURSE_SMTP_AUTHENTICATION: none
DISCOURSE_SMTP_ENABLE_START_TLS: false # (optional, default true)
EDIT: This is what I see in the email logs for the host (the email server). The error messages are new, starting after the rebuild.
The last message regarding Discourse in the email logs before the rebuild:
May 23 17:16:02 localhost postfix/smtpd[5247]: connect from discourse-docker[172.17.0.2]
May 23 17:16:02 localhost postfix/smtpd[5247]: 0D803B67FB: client=discourse-docker[172.17.0.2]
May 23 17:16:02 localhost postfix/cleanup[5279]: 0D803B67FB: message-id=<topic/421230/2413438.f609f9d756c226a154de43f4@forums.jag-lovers.com>
May 23 17:16:02 localhost postfix/smtpd[5247]: disconnect from discourse-docker[172.17.0.2] ehlo=1 mail=1 rcpt=1 data=1 quit=1 commands=5
The first entry in the email logs on the server after the rebuild:
May 23 17:22:48 localhost postfix/smtpd[10929]: connect from discourse-docker[172.17.0.2]
May 23 17:22:48 localhost postfix/smtpd[10929]: SSL_accept error from discourse-docker[172.17.0.2]: -1
May 23 17:22:48 localhost postfix/smtpd[10929]: warning: TLS library problem: error:14094412:SSL routines:ssl3_read_bytes:sslv3 alert bad certificate:../ssl/record/rec_layer_s3.c:1528:SSL alert number 42:
May 23 17:22:48 localhost postfix/smtpd[10929]: lost connection after STARTTLS from discourse-docker[172.17.0.2]
May 23 17:22:48 localhost postfix/smtpd[10929]: disconnect from discourse-docker[172.17.0.2] ehlo=1 starttls=0/1 commands=1/2
After that time the entries for Discourse in the email logs all look like that.
Screenshots:
