Problem : I try to send emails to a specific username (user@domain.com) but the email bounces.
Log entry:
Sep 24 05:52:55 xxxxxxxxxxx postfix/error[16880]: 1C509C108C: to=<user@domain.com>, relay=none, delay=0.44, delays=0.42/0.01/0/0.01, dsn=5.1.1, status=bounced (User unknown in virtual alias table)
Solution 1:
Make sure the user email is correct in postfix config file :
cat /etc/postfix/virtual|grep user@domain.com
Solution 2:
If the user exists and the name is correct. Then check the postfix configuration to make sure it is searching for the correct email address.
Postfix may search for:
- user.domain
- user@domain.com
Check which one is used.
Solution 3:
In case that 2nd format is used (user@domain.com) then do the following:
1) In webmin dashboard: Servers > Postfix > Address Rewriting and Masquerading
2) make sure the following parameters are set to (Yes):
That should solve the problem.
If you face any other issues, please submit a ticket here: Submit a ticket
