On Wed, Sep 21, 2016 at 11:56:14AM +0000, Eric Henson wrote: > http://go.microsoft.com/fwlink/?LinkID=614866&clcid >
Thanks, I was aware of this link however I'm more worried about a problem not necessarily tied to my own case. Another user using his own setup also gets spamboxed when mailing me, whereas someone else using a different MTA doesn't get spamboxed. I was hoping someone a bit technical could take a look at headers from a mail I sent myself and tell me "yes there is something wrong, can't tell you what" or "nope, the problem is not related to your message construct" so that I can at least know I'm not going to spend time looking in the wrong directions ;-) Sorry if this is not the right list to ask for similar questions but I know a bunch of people here could help, trying my chance Gilles > -----Original Message----- > From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Gilles Chehade > Sent: Wednesday, September 21, 2016 6:02 AM > To: mailop@mailop.org > Subject: [mailop] anyone from Microsoft around ? > > Hi, > > I'm lead developer of an opensource MTA called OpenSMTPD. > > We run a mailing-list for our project with very low volume, exchanging a few > thousands messages each month to around 400 people, very few of them being > hosted at big hosts, all of them having subscribed voluntarily. > > In addition to this, we use a few mailboxes at major hosts and send some > mails every now and then to ensure we didn't break the smtp engine, this > usually amounts to less than 10 mails / month per big ISP. > > All of these mails respect all best-practices that we know of: > > - they are sent from long existing domains; > - they are rate-limited despite low volume; > - they are DKIM/DomainKeys signed; > - DNS is properly configured with valid DNS/rDNS for the one IP address; > - IP address is the same as the MX accepting mail for the domain; > - SPF is properly declared, so is DMARC; > > I checked senderscore and we actually send so few volume we don't even have a > reputation visible there. > > I've started receiving complaints about users receiving their messages in the > spambox only at microsoft-hosted domains. No problem for gmail, yahoo, orange > and others, just microsoft. > > I did some testing, and it turns out that even the simplest mails will end up > spamboxed no matter what machine or domain I use to send. The reason > advertised in the Microsoft appended domains may vary if I turn off DKim, > strip some or all Received lines, but basically no matter my configuration, > mails will not be inboxed. > > I'm wondering if there is something wrong in the format of our headers and if > this could affect users of our software disregarding the kind of mails they > send with it. I've been tackling this for hours before contacting the mailing > list. > > Any help would be greatly appreciated, I'm running out of ideas :-) > > > -- > Gilles Chehade > > https://www.poolp.org @poolpOrg > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop -- Gilles Chehade https://www.poolp.org @poolpOrg _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
