Hi,
As far as I know, Microsoft has absolutely nothing to do with Yahoo as
far as Email handling is concerned, so it would make perfect sense that
Microsoft could do nothing about blocks at Yahoo. Microsoft mainly
handles Hotmail, Outlook, Live.com, MSN, and their international
equivalents. They have some business Email hosting using Outlook
servers, however, I've found that their internal supposed spam block
list they use for their free Email domains doesn't seem to apply to
their business clients.
Yahoo mail servers, on the other hand, seem to be handling Email for a
lot of places which used to handle their own Email. The most recent that
I know of is the AT&T domains, and Comcast is apparently coming soon.
They also handle Email for Yahoo of course, but also AOL and Verizon,
that I know of. I have no experience with being put on a Yahoo block
list, so have no pointers on how to get off such a list, but that would
have to be done through Yahoo, not Microsoft.
Hope this helps,
Jayson
On 8/17/2025 1:45 PM, David Andrews via Mailman-Users wrote:
I am writing users of Mailman2 to see if others might be having similar
experiences to me, or Is it just us?
I run a Mailman 2 installation for a nationwide nonprofit. We have a lot of
smaller lists, and a few big ones. We send something to our members once or
twice a week, that is about 11,500 emails. We have been running Mailman for
over 20 years, with similar usage. The numbers have gone up some over the
years, but not in big jumps.
We do send out some fund-raising messages, all our chapters and affiliates
do some, but I don't think they are excessive and a small part of the
overall volume.
Just over two months, Microsoft started blocking all mails from our domain.
The error messages said erratic mail volume or user complaints. After a
month of back and forth, they eventually lifted the ban. We did improve
things technically some, and tried to control things in a way to make them
happy. We instituted a hidden form, to defeat bot subscribers to lists. We
reduced the rate of emails we deliver per hour to slow down the flow. We
reduced the frequency the server tries to resend messages on the queue. We
did a full security audit and cleaned up our dns settings etc. We installed
more anti malware and anti-virus software.
The mail queue had been quite high when we were under some sort of
subscription attack, but it is back down in the neighborhood it usually is.
In addition to MS blocking us, all the providers for whom they process mail
blocked us, Yahoo, AOL, Verizon etc. They removed their ban, that is
Microsoft, but said they could do nothing about the others.
Yahoo, AOL etc., say, with error messages the block is temporary, but it has
been going on for over six weeks. The error says unexpected volume or user
complaints.
Things seem to have changed in the past six months. These providers seem to
be much more sensitive to things. We are doing what we have been doing for
over 20 years, and now it isn't acceptable, and I don't know how to improve
it.
Any thoughts, experiences, etc., advice would be appreciated. We are unable
to deliver valuable e-mails to all our members.
Dave
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