[Mailman-Users] Re: Fwd: Bounce action notification

2021-03-23 Thread Stephen J. Turnbull 
Vako Nicolian writes:

 > I forwarded only one of the bounces, check the list on this link: 

I'm a volunteer with limited time.  I analyze what you summarize.

 > Mainly *Lost connection while receiving the initial server
 > greeting*.

I have zero interest in those.  Nothing Mailman can do can affect
that.  It's a mailchannels problem, not a problem with the mail being
sent or the sender.  Unless that message means something completely
inconsistent with the normal, RFC 5321 usage of "initial server
greeting", it means that the only thing that the remote host knows is
the IP of relay.mailchannels.net.  It hasn't even seen HELO yet, so
even SPF doesn't apply.

My first guess is that mailchannels got itself on a commonly-used RBL,
or they screwed up their DNS.

 > I have never encountered such bounces with my regular email, that's
 > why I was pointing to MM, but I maybe wrong.

That's reasonable first-cut analysis, but I assure you, unless
mailchannels is completely confused about "initial server greeting,"
Mailman has absolutely nothing to do with it.

Steve


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[Mailman-Users] Re: Fwd: Bounce action notification

2021-03-23 Thread Mark Sapiro 
On 3/22/21 10:11 PM, Vako Nicolian wrote:
> I forwarded only one of the bounces, check the list on this link:
> https://www.dropbox.com/s/auuylwltwjpvqxo/MM2.jpg?dl=0


Which says nothing except there are lots of bounces.


> The attachment mentions the following and it's different for each
> bounce. Mainly *Lost connection while receiving the initial server
> greeting*.


This is an issue between the sending MTA and the recipient MTAs. It
almost certainly has nothing to do with Mailman. Mailman has delivered
the message to the outgoing MTA and it or some downstream MTA is
encountering this issue when attempting to deliver to the recipients.

You need to talk to whoever is responsible for that MTA. If that is you,
you need to get help from whoever supports that MTA software.

-- 
Mark Sapiro The highway is for gamblers,
San Francisco Bay Area, Californiabetter use your sense - B. Dylan
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[Mailman-Users] Re: Fwd: Bounce action notification

2021-03-22 Thread Vako Nicolian 
I forwarded only one of the bounces, check the list on this link: 
https://www.dropbox.com/s/auuylwltwjpvqxo/MM2.jpg?dl=0 

The attachment mentions the following and it's different for each 
bounce. Mainly *Lost connection while receiving the initial server 
greeting*.
I have never encountered such bounces with my regular email, that's why 
I was pointing to MM, but I maybe wrong.


<###@videotron.ca>: lost connection with mx.videotron.ca[24.201.245.37]
while receiving the initial server greeting

<###@videotron.ca>: lost connection with
mx.videotron.ca[24.201.245.37] while receiving the initial server greeting

<###@videotron.ca>: lost connection with mx.videotron.ca[24.201.245.37]
while receiving the initial server greeting

<###@msn.com>: lost connection with
msn-com.olc.protection.outlook.com[104.47.59.161] while receiving the
initial server greeting

<###@rogers.com>: lost connection with
mx-rogers.mail.am0.yahoodns.net[67.195.228.74] while receiving the initial
server greeting


Stephen J. Turnbull wrote on 3/22/2021 11:35 AM:

Vako Nicolian writes:

  > Today suddenly all my member emails bounced as you see a sample
  > below.
  > What happened and how can I fix it?

This seems very unlikely to be a mailman problem at all.

If for some reason somebody tries to blame it on Mailman and you want
more help, please be more precise about "all my member emails".  What
we see here is *one* post that bounced for a list of *several* email
addresses.  I don't want to guess whether you mean *all* posts are
bouncing to *everyone* or that it's a subset of posts or a subset of
addresses that are bouncing -- there are various mechanisms that could
cause the problem, and the exact set of mails that are bouncing will
help to distinguish them.

  > This is the mail system at host relay.mailchannels.net.

You expect mailchannels.net to be handling your outgoing mail, is that
correct?

[snip]

  > : lost connection with
  >  msn-com.olc.protection.outlook.com[104.47.59.161] while receiving the
  >  initial server greeting

This is from the MTA at mailchannels, so I can't be 100% sure, but it
looks like the remotes are rejecting your mail as soon as
relay.mailchannels.net tries to connect, and they don't actually talk
to relay at all.  The remotes have definitely not seen your mail, so
it cannot be a DKIM, DMARC, or content filtering problem, and if
"initial server greeting" means what I think it does, it hasn't seen
HELO yet so it's not SPF either.

The problem with this email is a mailchannels problem.  If others are
bouncing in different ways, it might be something else, even Mailman.

Steve

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