14

I am setting up a testing server for a web based application that sends some email notifications.

Sometimes testing is performed with real customer data, and for that reason I need to guarantee that the server is not able to send emails to our real customers while we're testing.

What I want is to configure postfix so that it takes any outgoing email and redirects it to a single email address, instead of delivering to the real destination.

I am running Ubuntu server 9.10.

Thank you in advance

0x6A75616E
  • 661

3 Answers3

21

Set up a local user to receive all trapped mail:

adduser mailtrap

You need to add in main.cf:

transport_maps = hash:/etc/postfix/transport
luser_relay = mailtrap

Then create /etc/postfix/transport with this in there:

localhost :
your.hostname.example.com:
* local:mailtrap

Save an then run: postmap /etc/postfix/transport finally restart postfix invoke-rc.d postfix restart

All local email will be delivered normally and external email will be delivered to the local mailtrap account.

Andrew Schulman
  • 9,142
10

Better is to create a virtual alias file:

In /etc/postfix/main.cf:

virtual_alias_maps = pcre:/etc/postfix/virtual

In /etc/postfix/virtual:

/.*@.*/ root

You can replace root with whichever user you'd like to receive all the outgoing e-mail. This pattern can be tweaked if you want local mail to be delivered normally (without redirection):

/.*@(?!hostname\.localdomain$).*/ root

Original idea found here: Postfix development server - intercept all outgoing mail

Community
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Paul Gideon Dann
  • 191
5

Postfix provides something called smtp-sink. By default it blackholes all of the email it receives. Later versions can also be configured to capture the email in files.

This doesn't technically use postfix (but a utility provided by postfix.) It also doesn't technically redirect each email to a single email address. But it does capture all traffic on port 25 and dumps that to a file that can be parsed.

toppledwagon
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