postfix is sending cron mails to relayhost on CentOS

LamerMmc · 07-18-2019, 07:05 AM

Hey there,

the cronjobs on my CentOS server are sending mails to root@hostname.domain due

Code:

MAILTO=root

in /etc/crontab.
And this is good so.
I want to keep these mails on the server, but my postfix is sending these to the relayhost.
How to prevent postfix to sending these mails. normal mails which will be send manually or by script should work.

My main.cf is quite standard. I just changed the relayhost value to send the mails to the relayserver.

Code:

queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
dta_directory = /var/lib/postfix
mail_owner = postfix
myorigin = server.domain.com
inet_interfaces = loopback-only
inet_protocols = ipv4
mydestination =
local_transport = error: local delivery disabled
unknown_local_recipient_reject_code = 550
relay_domains = $mydestination
relayhost = 10.10.10.10
recipient_canonical_classes = envelope_recipient, header_recipient
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
         ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.6.6/samples
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES

Can somebody help to keep these mails locally?

scasey · 07-18-2019, 08:55 AM

I don't know postfix, but have you tried

Code:

MAILTO=root@localhost

?

If that doesn't work, check this.

LamerMmc · 07-18-2019, 09:23 AM

Quote:

Originally Posted by scasey

I don't know postfix, but have you tried

Code:

MAILTO=root@localhost

?

If that doesn't work, check this.

Hi,

I also tried this.
But my issue not even for mails from cron, but also all mails to user@hostname.domain

scasey · 07-18-2019, 10:20 AM

Quote:

Originally Posted by LamerMmc

Hi,

I also tried this.
But my issue not even for mails from cron, but also all mails to user@hostname.domain

1. did changing the MAILTO in cron fix that problem?
2. what? "all emails to..." is not a question. What is the new problem?

LamerMmc · 07-18-2019, 10:40 AM

Quote:

Originally Posted by scasey

1. did changing the MAILTO in cron fix that problem?
2. what? "all emails to..." is not a question. What is the new problem?

1. did not fix the Problem
2. its not a question and there is no new problem.

I just want that all mails to user@hostname.domain not send out via postfix to relayhost.

scasey · 07-18-2019, 11:00 AM

Quote:

Originally Posted by LamerMmc

1. did not fix the Problem
2. its not a question and there is no new problem.

I just want that all mails to user@hostname.domain not send out via postfix to relayhost.

Only one user? Or all users at that domain address?
Where do you want the emails to go if not to your relayhost?

LamerMmc · 07-18-2019, 11:07 AM

Quote:

Originally Posted by scasey

Only one user? Or all users at that domain address?
Where do you want the emails to go if not to your relayhost?

all users. everything that matches user@hostname.domain as recipient.

local mail space. (via command 'mail')

everything else schould be send out as normal.

scasey · 07-18-2019, 02:34 PM

With qmail, we'd manage that with aliases.
Try searching for something like "postfix alias" or see man 5 aliases