Issues getting emails from Microsoft

Community Support Mail
2

Hi @luisedofon

The message is clear, the domain messaging.microsoft.com has an MX record defined:

$ dig messaging.microsoft.com mx +noall +ans
messaging.microsoft.com. 2636   IN      MX      10 messaging-microsoft-com.mail.protection.outlook.com.

But host messaging-microsoft-com.mail.protection.outlook.com doesn’t resolve to an IP.

$ dig messaging-microsoft-com.mail.protection.outlook.com a +noall +ans
$ dig messaging-microsoft-com.mail.protection.outlook.com aaaa +noall +ans

And obviously, that’s wrong, that is a Microsoft issue.

Anyway, if those messages are importat to you, edit /etc/exim4/exim4.conf.template and in block acl_check_rcpt add this line

  accept senders        = *@messaging.microsoft.com

Before this one:

  require verify        = sender

In context:

[...]
  deny    message       = Restricted characters in address
          domains       = !+local_domains
          local_parts   = ^[./|] : ^.*[@%!] : ^.*/\\.\\./

  accept senders        = *@messaging.microsoft.com

  require verify        = sender

  accept  hosts         = +relay_from_hosts
          control       = submission

  accept  authenticated = *
          control       = submission/domain=
[...]

Once modified, restart exim4:

systemctl restart exim4
4 Likes