How to prevent sending to non-existent external recipient

[ercan412]

Hi,

I'll use PMG as outgoing mail filtering only. I don't want to PMG send any e-mail to non-existent external recipient. How can I prevent this, is there any option ?

 

[Stoiko Ivanov]

If the recipient is non-existant the mailserver for that domain will reject the mail with 5xx and it won't get sent?!

 

[ercan412]

If the recipient is non-existant the mailserver for that domain will reject the mail with 5xx and it won't get sent?!

This will be used for mass e-mailing and I think sending to non-existant recipients over and over will decrease spam score. I expect PMG can add these recipients to temporary black list. Does it capable to send weekly reports for these errors in order to remove from mailing list.

 

[Stoiko Ivanov]

Does it capable to send weekly reports for these errors in order to remove from mailing list.

I would suggest to use a mailinglist software for this (sympa, mailman) - they are made for handling bounces and non-responding e-mail addresses and they do it quite well

you can also try to configure recipient verification for outbound mails as well - for this check the postfix documentation:
http://www.postfix.org/ADDRESS_VERIFICATION_README.html

and edit the pmg master.cf.in configuration template to add the appropriate options to the outbound postfix instance (by default the one listening on port 26):
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#pmgconfig_template_engine

 

[ercan412]

I would suggest to use a mailinglist software for this (sympa, mailman) - they are made for handling bounces and non-responding e-mail addresses and they do it quite well

you can also try to configure recipient verification for outbound mails as well - for this check the postfix documentation:
http://www.postfix.org/ADDRESS_VERIFICATION_README.html

and edit the pmg master.cf.in configuration template to add the appropriate options to the outbound postfix instance (by default the one listening on port 26):
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#pmgconfig_template_engine

I've copyed main.cf.in from /var/lib/pmg/templates/ to /var/lib/pmg/templates/. I've checked postfix documentation but I couldn't figure out what is appropriate options to the outbound postfix.