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Editorial Team
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Asked: 2026-06-17T08:25:36+00:00

Possible Duplicate: Parse email addresses for from and to fields in Ruby Given an

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Possible Duplicate:
Parse email addresses for “from” and “to” fields in Ruby

Given an email address of the form root@host.sub.domain.com, what is the regular expression to get the hostname and the subdomain as two individual variables? I mean $1='host'and $2='sub'?

You help is greatly appreciated 🙂

EDIT I should say I’m asking about a regular expression to do this, no Ruby code. This is to be used in a postfix configuration file, so I need a regexp. I mistakenly talked about Ruby earlier. My fault, sorry for the confusion.

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1 Answer

  1. Editorial Team

    Non-greedy groups are your friend. They match just what you need:

    ^(?:.*?)@(.*?)\.(.*?)\.(?:.*?)\.(?:.*?)$
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