[rt-users] Excluding Commands from CommandbyMail parsing

[Parish, Brent]

Hi.

Dunno if it is the best way, but what I do it in RT 4.4.1 is edit the file:
   /opt/rt4/local/plugins/RT-Extension-CommandByMail/lib/RT/Extension/CommandByMail.pm

Around line 349 look for this block of code, and add the line indicated with the plus (+) in front of it (without including the plus sign itself).

     my $found_pseudoheaders = 0;
     foreach my $line (@content) {
         next if $line =~ /^\s*$/ && ! $found_pseudoheaders;
+     last if $line =~ m/^(from:|cid:)/i;
         last if $line !~ /^(?:(\S+(?:{.*})?)\s*?:\s*?(.*)\s*?|)$/;
         last if not defined $1 and $found_pseudoheaders;
         next if not defined $1;

What this does is bail out of processing further lines as mail commands once it finds a line beginning with “From: “  (e.g. from a forwarded email).
It ALSO drops out if it finds “cid:”, which we sometimes saw with inline images being forwarded.

Please note that on older versions of RT, this block of code was found somewhere around line 228 in:
    /opt/rt4/local/plugins/RT-Extension-CommandByMail/lib/RT/Interface/Email/Filter/TakeAction.pm

Thanks,
Brent



From: rt-users [mailto:rt-users-bounces at lists.bestpractical.com] On Behalf Of Chris McClement
Sent: Sunday, October 02, 2016 7:56 PM
To: rt-users at lists.bestpractical.com
Subject: [rt-users] Excluding Commands from CommandbyMail parsing

I've implemented the CommandbyMail extension (http://search.cpan.org/dist/RT-Extension-CommandByMail/lib/RT/Extension/CommandByMail.pm<https://urldefense.proofpoint.com/v2/url?u=http-3A__search.cpan.org_dist_RT-2DExtension-2DCommandByMail_lib_RT_Extension_CommandByMail.pm&d=DQMFaQ&c=VCWpAYkS3z1bOCIxc-BPGZarCq9MRCAVxZJE051VqH8&r=luSRdPePk6fhFa3rH2PFBzWEtgcJguY0a__6vpfaX-I&m=w9n7nGyNHOocCsnkMnUOldv0qFl-mPDh51ajkbOaN3U&s=m5LJCFX4expBhfaKyApPYQfuwomxu0xiMr9dCbEBbAY&e=>) in my RT 4.4.4 installation. It works well - almost too well!  I am getting "Extended Mailgate Errors" returned because the plugin is parsing the message body for "Command: value" (which it is meant to do) and picking up, in emails forwarded to RT:

"To: xyz at abc.com<mailto:xyz at abc.com>"
"From: xyz at abc.com<mailto:xyz at abc.com>"
"sent: the_date_sent"

And trying to process them as commands.

In addition, forwarded emails have "Subject: [Support ID #12345] some_new_subject" and this is changing the subject of the RT job to the new subject, which is different from the subject used when the ticket was originally created.

Is there a way to stop CommandbyMail from parsing "to:" "from" and "sent:" as commands, or at least configuring it to not return errors when it fails to match it to a valid command? And is there a way to prevent parsing "Subject: xxxx" so that my subjects no longer change?


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