#1 match_recipients() utility function

[Greg Ward]

From an elspy-users post by Andrew Kuchling:

I've found the following function handy for checking if
a given recipient is
present in the envelope-to. Perhaps it's a candidate
for the elspy library?

Examples:
To reject all mail which is addressed to
spamtrap@example.com.

if match_recipients(info.recipients_list,
'spamtrap', 'example.com'):
raise RejectMessage("Spam not wanted here")

To allow only 'barb' and 'amk' local parts:

info.recipients_list =
match_recipients(info.recipients_list,
['barb', 'amk'],
'example.com')

--amk

[Greg Ward]

[Greg Ward]

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user_id=14422

Superficial reactions:
* can't this be done in an ACL?
* is a regex really needed?