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<TITLE>The Answer Gang 66: Procmail and regular expressions....(Snowwhite...)</TITLE>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
height="50" width="60" alt="(?) " border="0"
>Procmail and regular expressions....(Snowwhite...)</H3>
<p><strong>From Andrew Higgs
</strong></p>
<p align="right"><strong>Answered By Ben Okopnik, Mike Orr, Faber Fedor
<br></strong></p>
<P><STRONG><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
Hi all,
</STRONG></P>
<P><STRONG>
While on the subject....any suggestions on a good place to find out
about regular expressions and procmail.
</STRONG></P>
<P><STRONG>
I collect mail from one ISP mailbox and send it on to the correct user
based on email address. I also have a problem with people who use
mailing list groups in Outlook etc. How do I split these properly?
</STRONG></P>
<P><STRONG>
Any pointers gratiously accepted.
</STRONG></P>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
> [Ben]
"procmail" uses extended regexes, much the same as "egrep". So, for some
good examples and broad-scope explanations of those, try
</BLOCKQUOTE>
<PRE>
man procmailex
man procmailrc
man grep # The "REGULAR EXPRESSIONS" section is a great reference
man regex # Somewhat different "flavor", but useful
</PRE>
<BLOCKQUOTE>
For single address to multiple local user resolution, read the "Email
Addressing FAQ (How to use user+box@host addresses)" at
<A HREF="http://www.faqs.org/faqs/mail/addressing/">www.faqs.org/faqs/mail/addressing/</A> - as it happens, I just ran into this
thing yesterday, and was much impressed with the logical style and layout
of it. Even if this is not <em>exactly</em> what you're doing, there are a number
of relevant useful techniques described in this document - and it's mostly
based on doing it with "procmail".
</BLOCKQUOTE>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
> [Mike]
Ben! You even wrote the article about procmail antispam filtering and
you didn't mention it.
<IMG SRC="../../gx/dennis/smily.gif" ALT=":)"
height="24" width="20" align="middle"> Just in case Andrew hasn't seen it:
</BLOCKQUOTE>
<BLOCKQUOTE><BLOCKQuote>
<A HREF="../../issue62/okopnik.html"
>http://www.linuxgazette.com/issue62/okopnik.html</A>
</BLOCKQuote></BLOCKQUOTE>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
> [Faber]
Let me through out this little tidbit:
</BLOCKQUOTE>
<BLOCKQUOTE><BLOCKQuote>
If you use the \&lt; and \&gt; word boundary markers in procmail, keep in mind
that they consume (eat) the word boundary. Every other program I've
used the word boundary markers on did <EM>not</EM> eat them.
</BLOCKQuote></BLOCKQUOTE>
<BLOCKQUOTE>
Makes a BIG difference when your grepping your text (and took me an hour
to figure out!).
</BLOCKQUOTE>
<BLOCKQUOTE>
Regards,
<br>Faber Fedor
</BLOCKQUOTE>
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