Emails from Outlook.com bounced

1

I have an issue with receiving emails that are sent from outlook.com.

I have only this kind of entries in exim log:
2023-04-04 xx:xx:xx TLS error on connection from mail-ve1eur01on2054.outbound.protection.outlook.com (EUR01-VE1-obe.outbound.protection.outlook.com) [40.107.14.54] (send): The TLS connection was non-properly terminated.

Everything was working fine until a few days ago, and I haven’t touched exim config template. :slight_smile:

Should I try to disable tls_advertise_hosts? Not sure if it’s a good idea.

Interestingly, all other servers can send me an email without any problem. Including office365 ones that also use *.protection.outlook.com outgoing servers.

Any idea what could be the issue?

2

You can check details why: https://postmaster.outlook.com/

3

Not likely @desp .
I’m normal on SNDS, Good sender on Talos Intelligence and not on any blacklists.

Issue is deliverability from outlook.com, not to outlook.com.

4

Does anyone have the same problem?

Bounce emails say “machine actively refused it”…

Mails from standard O365 which uses the same emailprotection.outlook.com servers arrive just fine, as well as from other senders.

I have no idea whatsoever what could be wrong. M$ support is useless as usual.