Thank you Dallman for your procmail code to solve this problem !!
I've got it working on my machine, and even made some small tweaks to
create a version that extracts from both the To and Cc headers, and
returns all email addresses (but not the friendly names) in both of
those headers, in a comma separated list.
Here's the tweaked version.
# This routine takes a header containing both email addresses and
# friendly names, and returns just the email addresses, in a comma
# separated form.
#
# It checks both the To and Cc headers.
LINEBUF = 24000
:0
* HDRFLD ?? ^^()^^
{
SPACE = ' '
TAB = ' '
_ifs = ${_ifs:-,$SPACE}
HOSTCL = [a-zA-Z0-9-]
AHOST = ($HOSTCL+[.])*$HOSTCL+
ADDYCL = "[^]><)([$SPACE$TAB,;:\"'@]"
HDRFLDNAME = ${HDRFLDNAME:-To}
:0
* $ ^$HDRFLDNAME:.*\/[^$SPACE$TAB].*
{ HDRFLD = $MATCH }
HDRFLDNAME
HDRFLDNAME = ${HDRFLDNAME:-Cc}
:0
* $ ^$HDRFLDNAME:.*\/[^$SPACE$TAB].*
{ HDRFLD = ${MATCH:+$MATCH${_ifs}}$HDRFLD }
:0
{ _HOLD = $HDRFLD }
}
:0
* $ _HOLD ?? ()\/$ADDYCL+(_at_)$AHOST[(_dot_)][a-zA-Z]+
{
ADDRESS = $MATCH
STRIPPED_ADDRESSES =
${STRIPPED_ADDRESSES:+$STRIPPED_ADDRESSES${_ifs}}$ADDRESS
:0
* $ _HOLD ?? $\ADDRESS\/.+
{
_HOLD = $MATCH
SWITCHRC = $_
}
} _HOLD HDRFLDNAME _ifs ADDRESS # unset unneeded local
vars
##LOG = "Stripped addresses: >$STRIPPED_ADDRESSES<
##"
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