Hi Michael, Can you advise how one would “ramp up” such a new IP? The very nature of such transactional traffic is that it’s bursty, and may go for weeks when one may send a few dozen mails, then a few thousand on a specific day, then nothing again. Wouldn’t your systems detect that as ‘anomalous’ behaviour and do something about it?
Thanks -- ian From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Michael Wise via mailop Sent: 09 June 2016 14:27 To: Duncan Brannen <d...@st-andrews.ac.uk>; mailop@mailop.org Subject: Re: [mailop] Microsoft/Hotmail discards mails Separate IPs absolutely help, at least they do now. At some point, separate domains will be where it's at. "Canned Responses" are mandated by the Lawyers, who have had to deal with ... "Issues". I have been told that Return Path Sender Score is certainly a factor, and that they also have some extra services available, but exactly how they get this data I do not know, and can't comment on. I don't know. The largest factor that drives good reputation is having the Recipients safelist the sender. Another huge factor is engaging the recipient in a conversation of some sort. Further down the list is making sure that your traffic looks as little like spam as possible. If you use tricks that spammers do, for instance any kind of hashbuster text, etc... The system *WILL* notice. Past that, we're not allowed to provide information on why a particular email or campaign was sent to junk or silently dropped, and honestly, I have never been motivated to figure out the mechanics. Remember that, "Each Sender is Unique!", and there's millions of them, and Billions of emails an hour, let alone a day. Aloha, Michael. -- Sent from my Windows Phone ________________________________ From: Duncan Brannen<mailto:d...@st-andrews.ac.uk> Sent: 6/9/2016 1:16 AM To: mailop@mailop.org<mailto:mailop@mailop.org> Subject: Re: [mailop] Microsoft/Hotmail discards mails Hi, Just to throw our tuppence worth in. We have the same problem. It seems to be noticed when we send out offers of a place of study, a noticeable percentage of the emails are never received despite being accepted by Hotmail / outlook / live.com for delivery. We’re signed up for JMRP / SNDS, have opened tickets but can’t get anything back other than a canned response. (unusual activity or eligible/not eligible for partial mitigation) Is there a method for feeding back suggestions about this, eg a notification along the lines of the Junk report mechanism? By the sounds of it, there really isn’t any way to find out why emails are silently junked and asking applicants to whitelist the University would seem to be the only way to mitigate? Does Returnpath / Sender score help in any way here? One thought is to move all of our ‘business’ (ie official comms to applicants and enquirers) to one IP and keep staff/student / bulk email to eg alumni to a different IP but if anyone has any suggestions I’m open to them. Cheers, Duncan On 09/06/2016, 03:08, "mailop on behalf of Michael Wise via mailop" <mailop-boun...@mailop.org on behalf of mailop@mailop.org<mailto:mailop-boun...@mailop.org%20on%20behalf%20of%20mai...@mailop.org>> wrote: At the request of the customer-base, traffic that is classified as sufficiently spammy (by various "Black Box" algorithms that I have no knowledge of the inner workings...) is deleted even after a successful delivery. At one point, Hotmail tried to turn off the delete action for sufficiently spammy, and just delivered it into Junk; Customers complained. Loudly. So whether the system is correctly classifying your traffic or not, I cannot say. But the behavior is not unexpected in certain scenarios. Which one of them applies to you, I cannot say. Even if I wanted to! But I really have no idea, and no way to find out. This "Delete" action is a well-known mitigation that is not unique to Hotmail. About the only way around it would be to login to your test account, and safe sender the sending email address. Among other things, that will force the system to reconsider the verdict that it has assigned to the IP and the traffic coming from it. It's possible that the IPs have a left-over bad reputation from a previous sender, but that's difficult to tell. Good luck. Aloha, Michael. -- Michael J Wise | Microsoft | Spam Analysis | "Your Spam Specimen Has Been Processed." | Got the Junk Mail Reporting Tool ? -----Original Message----- From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Andreas Ziegler Sent: Wednesday, June 8, 2016 6:50 PM To: mailop@mailop.org<mailto:mailop@mailop.org> Subject: [mailop] Microsoft/Hotmail discards mails Hi, a user of my server complained, that some of his mails don't reach mail accounts from hotmail/live/outlook etc. that complaint is nothing new, the problem exists for months now. the users mails are dkim signed, the domain has DKIM and SPF TXT DNS records, since yesterday there is also a DMARC record. i investigated further, set up test accounts on both ends and indeed, they are accepting the mail with 250 but it doesn't appear in the inbox or even junk folder. According to SNDS, the IP has "normal status" and no events are logged. i reached out to them through their form two times and got the same answer twice, that the IP doesn't qualify for mitigation. the thing is, i can't figure out a) why they discard the mails b) why they don't reject them, that would be much better we're a low volume sender, so i investigated the logs manually and can't find any outgoing spam. all of the users recipients do really want to get these mails and are very upset that they don't receive them. and even if they didn't want to, they could tell via mail or even in person, as all of them are at the same university (and are friends). perhaps someone has an additional idea, another form or contact address or what can i try to solve this? ticket numbers: SRX1342522740ID / SRX1342663522ID. 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