Help with Mail Greylisting

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#1 Thu, 04/07/2016 - 02:41
netizen

Help with Mail Greylisting

Hello,

I can whitelist fixed hostnames (or IPs) but I am having problem to create a regular expression. In specific I want to whitelist email coming from outlook.com servers. One of the servers is mail-am1on0121.outbound.protection.outlook.com so I want to whitelist everything that comes from a hostname that matches this > *.outbound.protection.outlook.com

I tried using ^mail-*.outbound.protection.outlook.com$ (and selected the regular expression tickbox) however it does not work. What am I doing wrong?

Any help is much appreciated. Thank you

Thu, 04/07/2016 - 10:27
andreychek

Howdy,

Take a look at the "Whitelisting" section in the postgrey man page for some examples.

However, within regular expressions, an "*" character refers to 0 or more of the previous expression.

So to create a wildcard, you would want to use ".*", rather than just "*". It can also be helpful (but not necessary) to escape . characters that aren't meant to be wildcards.

In all, that would look something like:

mail-.*\.outbound\.protection\.outlook\.com

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