Used Zammad installation source: (source, package, …) package
Operating system: Ubuntu 16.04
Browser + version: Firefox 60.0.1
Zammad should send changes and mails immediatly or after a short time.
When a comment is done or a mail should be send through Zammad it takes 3 to 4 hours till the mail is send. After that time everything works fine. There is no difference between localhost relay or direct smtp.
I searched the Mailserver logs and there is always this 3 hour delay till the mail appears in the mailqueue.
Steps to reproduce the behavior:
Send a mail through Zammad.
Is it possible to configure this delay in Zammad oder what couls be the reason? Zammad is running on a Ubuntu System with 2x4 CPU Cores and 16GB RAM. Average Load is 1.3 1.4 1.4, so the system should not be overloaded.