On Wed, Jul 9, 2014 at 9:10 PM, Ben Reser <b...@reser.org> wrote: > On 7/7/14 6:23 AM, Notes Jonny wrote: >> Have you thought about adding [svn users] to prefix the subject of emails? >> >> It would make my mailbox simpler to prioritise all emails.. Currently >> I need to read the subjects.. or implement some complex filtering to >> folder of svn users emails.. > > Modifying mail going to mailing lists is a very bad idea these days. It's > becoming increasingly common for mail providers to sign mail and then publish > DNS records that tell receivers that they can reject mail that is not properly > signed. Modifying the mail then means these signatures no longer validate and > the mail may be rejected. > > Yahoo changed their DMARC settings in April of this year to tell receivers > that > they should start rejecting mail that was not signed. This caused many > mailing > lists that are doing exactly what you suggest to start dropping mail coming > from Yahoo users. > > The solutions for this as outlined here are not great: > http://www.dmarc.org/faq.html#s_3 > http://wiki.asrg.sp.am/wiki/Mitigating_DMARC_damage_to_third_party_mail > > It basically comes down to: > > 1) Don't modify mail. > > 2) Start modifying the mail in more intrusive ways. > > At the Apache Software Foundation for lists that don't follow the first option > they've adopted the .invalid option: > http://wiki.asrg.sp.am/wiki/Mitigating_DMARC_damage_to_third_party_mail#Add_fixed_string_such_as_.invalid_to_addresses > > Which means for domains where DMARC configuration would break the mail the > sender mail is changed to have a .invalid postfix on the sender's address. > For > example in the case of Yahoo u...@yahoo.com.invalid > > This would be particularly problematic for our users@ list because often we > have posters who are not subscribed to the list and would like to receive the > responses back. Responders would have to pay attention to the addresses and > fix them manually in all these cases. > > I don't think munging the email subject is worth dealing with that.
Hi Ben Thank you for making these points. Unfortunately I agree that it is no longer possible to do what I feel is the ideal solution (add an [subversion-users] to subject). Thanks again for providing the links Jon
