Re: [mailop] dovecot lmtp and smtputf8

[Kevin Kelker via mailop]

+1


Last official statement we saw was, that it's being tracked internally as 
DOP-1045

https://www.dovecot.org/pipermail/dovecot/2019-March/115286.html




However, we'd be interested in the current state regarding this as well.


Best

Kevin


Von: Kamil Jońca 
Gesendet: Dienstag, 24. Oktober 2023 07:04:02
An: dove...@dovecot.org
Betreff: dovecot lmtp and smtputf8


Does dovecot handle smtputf8?
Last articles regarding this are several years old.
Anything changed?
KJ
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Re: [mailop] outlook.com 421 try again later S77719

[Kevin Kelker via mailop]

Hi List,

was about to write the same just when Andreas' mail popped up.
Also noticing an increasing amount of mails towards Microsoft getting deferred 
with
 451 4.7.500 Server busy. Please try again later from [x.x.x.x]. (S77719)


We see this happening for different from-domains as well for different 
sender-IPs since about 0300 UTC and have also reports
of other ISP having the same issue. We are using their SNDS and none of the 
sender-IPs are flagged on their side.

Maybe someone from MS could take a look into this as our queues are piling up.

Best
Kevin



Von: mailop  im Auftrag von Andreas via mailop 

Gesendet: Mittwoch, 11. Oktober 2023 11:12:39
An: mailop@mailop.org
Betreff: [mailop] outlook.com 421 try again later S77719


Hello all,

since a few hours we have problems with sending to Microsoft. We get hundreds 
of messages like in the subject with the reference to S77719. Also colleagues 
from other companies in germany are seeing the same in their logs. All mails 
that are blocked here are from Microsoft customers, but they are redirected 
through our servers.

Trying to unblock the IP e.g. via https://sender.office.com/ shows that the IPs 
are not blocked.

Anybody have any idea?

Thanks a lot
Andreas
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Re: [mailop] Delivery and DNS issues for Microsoft / m365

[Kevin Kelker via mailop]

Hey Dan,

we can confirm both the lookup fails and the ATTR2 errors.
Looking back in the logs, we start seeing the lookup fails since about 08:04 
UTC.


--
Kevin Kelker (Postmaster),
Mittwald CM Service GmbH & Co. KG



Von: mailop  im Auftrag von Dan Malm via mailop 

Gesendet: Mittwoch, 6. Juli 2022 11:41
An: mailop@mailop.org
Betreff: [mailop] Delivery and DNS issues for Microsoft / m365

Hi,

We're seeing a lot of DNS errors for *.mail.protection.outlook.com at
the moment. NS lookup for mail.protection.outlook.com resolves to two
hostnames that in turn resolve to the same IP. What IP they both
resolves to varies over time, and one or more of those IPs doesn't
respond at all on port 53, so whenever the non working IP is cached we
can't lookup MX records for m365 customers for a while. The DNS servers
we can reach also don't support edns or qname minimization...

And when DNS doesn't fail we have a lot of deliveries respond with:

Temporary server error. Please try again later ATTR2
[GV0CHE01FT017.eop-che01.prod.protection.outlook.com

I'm assuming we're not the only ones seeing these problems at the moment?

https://portal.office.com/servicestatus lists issues with outlook.com
but the description there doesn't seem to fit what I'm seeing.

--
BR/Mvh. Dan Malm, Systems Engineer, One.com
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