You should use perlbug to send bug emails. Mails not containing the footer that perlbug produces are likely to get eaten by the spam filters I think.
Note that perlbug also can give you a text file to paste into your mail.
If you want to add information to an existing bug, you need to mention "RT #12345" in your mail subject I think. The exact format is also described in the text that RT or perlbug output.
In reply to Re: Reporting a bug in Perl is tricky
by Corion
in thread Reporting a bug in Perl is tricky
by rdiez
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