After update - postfix no longer can send email

[clint70]

I have looked over the postfix main.cf, but cannot see the issue. The mail server is up / responding and sending confirmed from another node. BUT this node just stopped sending. Included here is syslog and main.cf

Appreciate any help. Cheers!

# See /usr/share/postfix/main.cf.dist for a commented, more complete version
myhostname=defender.cyberrover.ca
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases

mydestination = $hostname, localhost.$mydomain, localhost
#relayhost = 
inet_interfaces = all

recipient_delimiter = +

compatibility_level = 2

myorigin=/etc/mailname
mailbox_command=
mailbox_size_limit=0
inet_protocols=ipv4
mynetworks = 127.0.0.1/32 10.1.1.10/32 10.10.200.10/32
relayhost = [mail.cyberrover.ca]:25

#smtp_use_tls = yes
#smtp_sasl_auth_enable = yes
#smtp_sasl_security_options = noanonymous
#smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
#smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt

Oct 05 10:13:19 defender systemd[1]: Started Postfix Mail Transport Agent (instance -).
Oct 05 10:13:28 defender postfix/pickup[2247029]: 52B7E287A78: uid=0 from=<root@cyberrover.ca>
Oct 05 10:13:28 defender postfix/cleanup[2247326]: 52B7E287A78: message-id=<20211005141328.52B7E287A78@defender.cyberrover.ca>
Oct 05 10:13:28 defender postfix/qmgr[2247030]: 52B7E287A78: from=<root@cyberrover.ca>, size=269, nrcpt=1 (queue active)
Oct 05 10:13:31 defender postfix/smtp[2247330]: 52B7E287A78: to=<disco2@cyberrover.ca>, relay=mail.cyberrover.ca[10.10.10.54]:25, delay=3.2, delays=0.02/0.01/3.1/0.05, dsn=5.1.0, status=bounced (host mail.cyberrover.ca[10.10.10.54] said: 550 5.1.0 <root@cyberrover.ca>: Sender address rejected: User unknown in virtual mailbox table (in reply to RCPT TO command))
Oct 05 10:13:31 defender postfix/qmgr[2247030]: 52B7E287A78: removed
Oct 05 10:13:31 defender postfix/cleanup[2247326]: 7ED25287A6A: message-id=<20211005141331.7ED25287A6A@defender.cyberrover.ca>

 

[Stoiko Ivanov]

host mail.cyberrover.ca[10.10.10.54] said: 550 5.1.0 <root@cyberrover.ca>: Sender address rejected: User unknown in virtual mailbox table

This basically says that mail.cyberrover.ca rejected the mail - so looking at the logs there should help (especially if you compare them to the logs from the nodes where mail is working

on a hunch - compare the e-mail addressess configured for the 'root@pam' user (GUI->Datacenter->Permissions->User) between a system where it's working and one where it's not

I hope this helps!

 

[clint70]

This basically says that mail.cyberrover.ca rejected the mail - so looking at the logs there should help (especially if you compare them to the logs from the nodes where mail is working

on a hunch - compare the e-mail addressess configured for the 'root@pam' user (GUI->Datacenter->Permissions->User) between a system where it's working and one where it's not

I hope this helps!

Thank you... I will go check both the syslog and the @pam. Already been in to the good nodes to compare main.cf's but can't see any obvious issues.