Linux – How to configure sendmail to only send to specified domains

centosemaillinuxPHPsendmail

I have a local development server (centos) which I develop a number of websites on. Occasionally I need to test email sending scripts.

I want to avoid the development server from sending emails to anyone who doesn't have an email address with a particular domain (ie: jon@mydomain.com, mary@mydomain.com, etc). So, I would like to create a white list or rule on the server which prevents emails being sent to any email address that doesn't match mydomain.com.

I'm currently using PHP's built-in mail() function. But I imagine this is something more on the server level and I would like something that will manage ANY emails sent out from the server from any program/app/script/etc.

I can confirm that PHP is using /usr/sbin/sendmail.sendmail

Best Answer

here is how I managed to do it. In Sendmail, you need to modify the mailertable. Add the following:

alloweddomainname.com   alloweddomainname.com
.   error:

This will essentially send any emails to @alloweddomainname.com and error for anything else.

Related Solutions

Linux – How to allow sendmail to send TO any address

If this is a mail from you:

Date: Thu, 21 Oct 2010 14:56:03 -0400
From: root <root@dev.tridiumtech.com>
To: reaper@teaparty.net
Subject: Test

Test

which based on your profile I suspect it is, then whatever the problem on your system, it's not with sendmail. Your sendmail is configured fine as regards outbound email.

That said, clearly something doesn't work, or you wouldn't have posted. Would you care to edit your question, or open a new one, saying what you know (what you're trying to achieve, what you're doing, what's happening), rather than what you think might be the underlying cause?

Php – Redirect all email sent via PHP’s mail() function to single external address

You can try this:

recipient_canonical_maps = pcre:/etc/postfix/recipient_canonical.pcre

Then put a catch-all in /etc/postfix/recipient_canonical.pcre:

/.*/ your@email.com

Best Answer

Related Solutions

Linux – How to allow sendmail to send TO any address

Php – Redirect all email sent via PHP’s mail() function to single external address

Related Topic