Hello,
Anyone had any issues with sending to Shaw email addresses recently? I have a client that sends out smallish batches of emails once every week or so, and last week a number of them we blocked, but some went through. Never had this happen before. I confirmed with shaw that some of the addresses were active and receiving emails but that's about as helpful as they would allow themselves to be.
Returned email (with email addresses made private):
This is the mail system at host leaf102.mfilter.dimenoc.com.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system
-shawuser1-@shaw.ca: host shw-central.mx.a.cloudfilter.net[15.222.199.59] refused to talk to me: 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
-shawuser2-@shaw.ca: host shw-central.mx.a.cloudfilter.net[15.222.199.59] refused to talk to me: 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL Reporting-MTA: dns; leaf102.mfilter.dimenoc.com X-Postfix-Queue-ID: 867B32645F X-Postfix-Sender: rfc822; sender@company.com Arrival-Date: Tue, 30 Apr 2024 13:00:50 -0400 (EDT)
Final-Recipient: rfc822; -shawuser1-@shaw.ca Original-Recipient: rfc822;-shawuser1-@shaw.ca Action: failed Status: 4.0.0 Remote-MTA: dns; shw-central.mx.a.cloudfilter.net Diagnostic-Code: smtp; 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
Final-Recipient: rfc822; -shawuser2-@shaw.ca Original-Recipient: rfc822;-shawuser2-@shaw.ca Action: failed Status: 4.0.0 Remote-MTA: dns; shw-central.mx.a.cloudfilter.net Diagnostic-Code: smtp; 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
Regards, -Montana
In the last 2-3 weeks, 2 e-mails of mine to one particular Shaw e-mail address seem to be lost, and 4-5 weeks ago, a previous e-mail of mine to the same Shaw e-mail address (a friend) was lost. Nothing bounced back to me either, unlike your case.
I do have some misgivings about this person's newly re-configured e-mail system (after a hard disk loss), but considering your experience, I now wonder whether my losses are part of the same problem you're having.
Hartmut
On Mon 06 May 2024 at 14:51:42 -05:00, Montana Quiring montanaq@gmail.com wrote:
Hello,
Anyone had any issues with sending to Shaw email addresses recently? I have a client that sends out smallish batches of emails once every week or so, and last week a number of them we blocked, but some went through. Never had this happen before. I confirmed with shaw that some of the addresses were active and receiving emails but that's about as helpful as they would allow themselves to be.
Returned email (with email addresses made private):
This is the mail system at host leaf102.mfilter.dimenoc.com.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system-shawuser1-@shaw.ca: host shw-central.mx.a.cloudfilter.net[15.222.199.59] refused to talk to me: 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
-shawuser2-@shaw.ca: host shw-central.mx.a.cloudfilter.net[15.222.199.59] refused to talk to me: 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL Reporting-MTA: dns; leaf102.mfilter.dimenoc.com X-Postfix-Queue-ID: 867B32645F X-Postfix-Sender: rfc822; sender@company.com Arrival-Date: Tue, 30 Apr 2024 13:00:50 -0400 (EDT)
Final-Recipient: rfc822; -shawuser1-@shaw.ca Original-Recipient: rfc822;-shawuser1-@shaw.ca mailto:rfc822%3B-shawuser1-@shaw.ca Action: failed Status: 4.0.0 Remote-MTA: dns; shw-central.mx.a.cloudfilter.net Diagnostic-Code: smtp; 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
Final-Recipient: rfc822; -shawuser2-@shaw.ca Original-Recipient: rfc822;-shawuser2-@shaw.ca mailto:rfc822%3B-shawuser2-@shaw.ca Action: failed Status: 4.0.0 Remote-MTA: dns; shw-central.mx.a.cloudfilter.net Diagnostic-Code: smtp; 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
Regards, -Montana _______________________________________________ Roundtable mailing list Roundtable@muug.ca https://muug.ca/mailman/listinfo/roundtable
Cheers. Thanks for sharing your experience.
Regards, -Montana
On Mon, May 6, 2024 at 6:35 PM Hartmut W Sager hwsager@marityme.net wrote:
In the last 2-3 weeks, 2 e-mails of mine to one particular Shaw e-mail address seem to be lost, and 4-5 weeks ago, a previous e-mail of mine to the same Shaw e-mail address (a friend) was lost. Nothing bounced back to me either, unlike your case.
I do have some misgivings about this person's newly re-configured e-mail system (after a hard disk loss), but considering your experience, I now wonder whether my losses are part of the same problem you're having.
Hartmut
On Mon 06 May 2024 at 14:51:42 -05:00, Montana Quiring montanaq@gmail.com wrote:
Hello,
Anyone had any issues with sending to Shaw email addresses recently? I have a client that sends out smallish batches of emails once every week or so, and last week a number of them we blocked, but some went through. Never had this happen before. I confirmed with shaw that some of the addresses were active and receiving emails but that's about as helpful as they would allow themselves to be.
Returned email (with email addresses made private):
This is the mail system at host leaf102.mfilter.dimenoc.com.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system-shawuser1-@shaw.ca: host shw-central.mx.a.cloudfilter.net [15.222.199.59] refused to talk to me: 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
-shawuser2-@shaw.ca: host shw-central.mx.a.cloudfilter.net [15.222.199.59] refused to talk to me: 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL Reporting-MTA: dns; leaf102.mfilter.dimenoc.com X-Postfix-Queue-ID: 867B32645F X-Postfix-Sender: rfc822; sender@company.com Arrival-Date: Tue, 30 Apr 2024 13:00:50 -0400 (EDT)
Final-Recipient: rfc822; -shawuser1-@shaw.ca Original-Recipient: rfc822;-shawuser1-@shaw.ca Action: failed Status: 4.0.0 Remote-MTA: dns; shw-central.mx.a.cloudfilter.net Diagnostic-Code: smtp; 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
Final-Recipient: rfc822; -shawuser2-@shaw.ca Original-Recipient: rfc822;-shawuser2-@shaw.ca Action: failed Status: 4.0.0 Remote-MTA: dns; shw-central.mx.a.cloudfilter.net Diagnostic-Code: smtp; 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
Regards, -Montana _______________________________________________ Roundtable mailing list Roundtable@muug.ca https://muug.ca/mailman/listinfo/roundtable
Roundtable mailing list Roundtable@muug.ca https://muug.ca/mailman/listinfo/roundtable
On 2024-05-06 Montana Quiring wrote:
Hello,
Anyone had any issues with sending to Shaw email addresses recently? I have a client that sends out smallish batches of emails once every week or so, and last week a number of them we blocked, but some went through. Never had this happen before.
-shawuser1-@shaw.ca: host shw-central.mx.a.cloudfilter.net[15.222.199.59] refused to talk to me: 554 shw-ibgw-4002a.ext.cloudfilter.net cmsmtp 72.29.89.5 blocked AUP#BL
"blocked...BL" means your client has their IP (though could be their domain) on an email blocklist. Maybe one named "AUP"?
There are websites that let you put in your IP and see what BLs you're on. Give that a try. Then you can contact the offending BLs to try to get off.
Looks like (from the above debugs) Shaw is outsourcing this job to cloudfilter. But the root BL cause is the avenue to attack first.
But you're in luck! Tomorrow (Tues) is MUUG night and I'm presenting on the tech that all these "Big Email" guys want you to use. Implementing what I'm going to present may help with your client's deliverability by improving their overall score (though BLs can be a slightly different beast, all these things are related).
We haven't seen you in forever, Montana, so come check us out (or online)! :-)
Hartmut:
Your case would be slightly different since you are getting drops, not bounces. Your case could be more related to what I'm going to present than Montana's. All the Big Email companies are making life extremely difficult for little senders and huge senders alike. The Borg demands its sacrifices!! :-)
On Mon 06 May 2024 at 22:48:30 -05:00, Trevor Cordes trevor@tecnopolis.ca wrote:
Hartmut:
Your case would be slightly different since you are getting drops, not bounces. Your case could be more related to what I'm going to present than Montana's.
Indeed, I want to attend, if I can get a ride. Otherwise, I'll try virtual, though that doesn't work well on my hardware (read: dated).
All the Big Email companies are making life extremely difficult for little senders and huge senders alike. The Borg demands its sacrifices!! :-)
That's what I've been preaching to my friends and customers for the last number of years, and I've been supplying them with e-mail facilities that do SPF/DKIM/DMARC properly. That still doesn't entirely stop Gmail (as receiver) from deciding by their divine algorithms to "silently discard" messages - not spam, no non-focussed (er, misfocussed) Inbox, no bounce, just silence - sender and receiver are none the wiser.
Hartmut
Thanks again for the responses folks. Ya, it's been a while Trevor. :) Sounds like a great talk. good for you. Unfortunately I teach kickboxing most Tuesday evenings, so I won't be able to attend/watch. :(
And yes, sadly the internet seems to be slowly becoming a place where giants battle.
Regards, -Montana
On Tue, May 7, 2024 at 2:35 AM Hartmut W Sager hwsager@marityme.net wrote:
On Mon 06 May 2024 at 22:48:30 -05:00, Trevor Cordes trevor@tecnopolis.ca wrote:
Hartmut:
Your case would be slightly different since you are getting drops, not bounces. Your case could be more related to what I'm going to present than Montana's.
Indeed, I want to attend, if I can get a ride. Otherwise, I'll try virtual, though that doesn't work well on my hardware (read: dated).
All the Big Email companies are making life extremely difficult for little senders and huge senders alike. The Borg demands its sacrifices!! :-)
That's what I've been preaching to my friends and customers for the last number of years, and I've been supplying them with e-mail facilities that do SPF/DKIM/DMARC properly. That still doesn't entirely stop Gmail (as receiver) from deciding by their divine algorithms to "silently discard" messages - not spam, no non-focussed (er, misfocussed) Inbox, no bounce, just silence - sender and receiver are none the wiser.
Hartmut
-
Hartmut W Sager -
Montana Quiring -
Trevor Cordes