How to redirect all postfix emails to one external email address?

Question

To create a test email server, I have a similar requirement as:

http://serverfault.com/questions/94640/how-to-redirect-all-outgoing-email-from-postfix-to-a-single-address-for-testing

But I need to send all the emails to an external account, not a local one.

I would like to do something like:

• xyz:email@gmail.com

but xyz is not local nor smtp.

Answer 1

Create /etc/postfix/virtual-regexp with the following content:

/.+@.+/ email@gmail.com

Edit /etc/postfix/main.cf and add regexp:/etc/postfix/virtual-regexp to the virtual_maps configuration. The end result might look like this in main.cf:

virtual_maps = hash:/etc/postfix/virtual, regexp:/etc/postfix/virtual-regexp

Build the mapfile by typing:

postmap /etc/postfix/virtual-regexp

This also requires a virtual.db to exist. If it doesn't create an empty file called virtual and run : postmap /etc/postfix/virtual

Voila!

Answer 2

Is it acceptable to just have it go to a local account that then forward all mail to your external address? You could get it running like the other question you mentioned, and then use procmail to have the messages forwarded and then deleted locally. Something like this would probably do the trick by replacing the folder with /dev/null.