Zammad not sending email on ticket creation

Infos:

  • Used Zammad version: 6.2.0-1710498361.5a49c0a0.focal
  • Used Zammad installation type: (source, package, docker-compose, …): package
  • Operating system: Ubuntu 20.04
  • Browser + version: Chrome

Expected behavior:

  • To send email to customer on new ticket

Actual behavior:

  • Not sending email at all. I have configured SMTP for both inbound and outbout, notification sender is set to: "#{config.product_name} <zammad-sender-email@mysite.com >

Steps to reproduce the behavior:

  • Try to create a new ticket as customer

Production.log: Zammad log - Pastebin.com

My log is redacted to replace personal data:

SMTP server IP referenced in log: smtp.server.ip
Customer email that I used for ticket creation: customer-email@domain.com
SMTP username and notification sender: zammad-sender-email@mysite.com
Notification Sender in Settings: #{config.product_name} zammad-sender-email@mysite.com
SMTP host: mail.mysite.com

Same error happens when using sendmail too.

Trigger is created like this:

I can’t figure out what user it is trying to find in the error log “smtp: no such user here”. Anyone faced such problem? Let me know if more info needed.