> Do not list googlemail.com in virtual_mailbox_domains. > > To verify: > > $ postmap -q googlemail.com mysql:/etc/postfix/my/domains.conf > > This command should produce no output, no error message, and it > should terminate with a non-zero exit status.
Thanks a lot for this fast answer! It's every time the same. Spent a whole day on a damn mistake. My SQL where clause in the virtual_mailbox_domains config was wrong. Due to a typing error it produced a result for almost every domain. Best regards Jan