OT: Perl Compatible Regular Expressions

Paul Welsh paul at welshfamily.com
Sat Dec 17 20:22:49 GMT 2011

On 17 December 2011 20:11, Paul Welsh <paul at welshfamily.com> wrote:

> For example, this works fine:
> *.domain.com
> - matches mail.domain.com, xxx.mail.com, etc

Just thinking, if it's a domain like amazon.com then perhaps
*.amazon.com is pretty safe.  After all, I believe Exim does a reverse
lookup on the IP to retrieve the hostname.

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