Nils asked,
| The exact recipient is shown in the Delivered-To header in my MTA, so I
| figured this should work:
| *
^Delivered-To:(_dot_)*user+extra-info-here(_at_)mybox(_dot_)example(_dot_)com(_dot_)*
As Timothy has already pointed out, the trailing ".*" is of no benefit (unless
it's to the right of \/) and just slows procmail down, and the periods should
be escaped.
But the problem is that you aren't escaping the plus sign. A plus sign is
magic by default; it means "one or more of the preceding," so your r+ matches
r, rr, rrr, rrrr, or so forth but not an r followed by a literal plus sign.
So short of any other details, I'll suggest this:
*
^Delivered-To:(_dot_)*user\+extra-info-here(_at_)mybox\(_dot_)example\(_dot_)com
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