пятница, 27 ноября 2020 г.

Configure postfix to relay mail for exchange server with authentication

 It need to add next package to postfix server:

yum install cyrus-sasl cyrus-sasl-lib cyrus-sasl-plain

and add the next rows to postfix main.cf file:

smtp_sasl_auth_enable = yes

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

smtp_sasl_security_options = noanonymous 

smtpd_sasl_path = smtpd

relayhost = [smtp.server.name]

smtp_generic_maps = hash:/etc/postfix/generic


Aslo need add to file /etc/postfix/sasl_passwd auth data in the next format:

smtp.server.name   username:password

then run 

postmap   /etc/postfix/sasl_passwd

Due to local mail send from root user, you need to change mailer from (it is if your exchange server doesn't allow anonymous connection). Add to file /etc/postfix/generic row:

root@your_linux_server_name       username

and run 

postmap  /etc/postfix/generic


and restart postfix



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