Re: [mailop] Anybody seeing a huge spike of (S3140) errors from Hotmail/Outlook started on Sep 7th
Hi Rauf, Yes, we observed the same things at our end. One of our customer account got compromised which causes some spam through our system that impacted the whole n/w from the same IP space though other IP's are dedicated and carry a good reputation at SNDS. We tried to reach out to the support team with multiple tickets but could get expected responses apart from standard response. Not sure why whole n/w blocked when only specific IP's send spam due to compromised account. On Fri, Sep 11, 2020 at 11:22 PM Adam Moffett via mailop wrote: > I have fought this battle before, and in my case it turned out to be a > compromised user account. Check logs for a sender with unusually high > volume. While you're waiting for the response to your ticket you can use > your time to hunt for that underlying problem. I do wish they provided > samples of the offender's messages, as that would remove any doubt and make > it much easier to see where the problem is. > > They also may not unblock you for some period of time after the activity > stops. I have had it take days. > > > > -- Original Message -- > From: "Rauf Guliyev via mailop" > To: mailop@mailop.org > Sent: 9/9/2020 5:58:52 PM > Subject: [mailop] Anybody seeing a huge spike of (S3140) errors from > Hotmail/Outlook started on Sep 7th > > Hello there, > > We are seeing a huge spike in "550 5.7.1 Unfortunately, messages from [ > IP.AD.DR.ES] weren't sent. Please contact your Internet service provider > since part of their network is on our block list (S3140)" errors while > sending to Hotmail/Outlook. It started on Sep 7th and is affecting only one > datacenter, the rest is sending the same emails just fine. The SNDS shows > the affected IPs as green. Filed a ticket (SR1508383241) but curious to see > if it's widespread. > > Thanks in advance, > Rauf > > ___ > 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
Re: [mailop] Anybody seeing a huge spike of (S3140) errors from Hotmail/Outlook started on Sep 7th
I have fought this battle before, and in my case it turned out to be a compromised user account. Check logs for a sender with unusually high volume. While you're waiting for the response to your ticket you can use your time to hunt for that underlying problem. I do wish they provided samples of the offender's messages, as that would remove any doubt and make it much easier to see where the problem is. They also may not unblock you for some period of time after the activity stops. I have had it take days. -- Original Message -- From: "Rauf Guliyev via mailop" To: mailop@mailop.org Sent: 9/9/2020 5:58:52 PM Subject: [mailop] Anybody seeing a huge spike of (S3140) errors from Hotmail/Outlook started on Sep 7th Hello there, We are seeing a huge spike in "550 5.7.1 Unfortunately, messages from [IP.AD.DR.ES] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140)" errors while sending to Hotmail/Outlook. It started on Sep 7th and is affecting only one datacenter, the rest is sending the same emails just fine. The SNDS shows the affected IPs as green. Filed a ticket (SR1508383241) but curious to see if it's widespread. Thanks in advance, Rauf ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
[mailop] Anybody seeing a huge spike of (S3140) errors from Hotmail/Outlook started on Sep 7th
Hello there, We are seeing a huge spike in "550 5.7.1 Unfortunately, messages from [ IP.AD.DR.ES] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140)" errors while sending to Hotmail/Outlook. It started on Sep 7th and is affecting only one datacenter, the rest is sending the same emails just fine. The SNDS shows the affected IPs as green. Filed a ticket (SR1508383241) but curious to see if it's widespread. Thanks in advance, Rauf ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
