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On Wed, 14 Oct 2015, grupo correo wrote:

we are working in the migration from courier-imap to dovecot 2.2.10-4.el7_0.1.x86_64.

Some emails that send a internal application show as sender "MISSING_MAILBOX@missing_domain", i use like email client Horde using dovecot like server. But if i open that email with Horde and courier-imap i can see the correct email sender.

I think that the email of the sender is no correct or not accomplish some RFC. Can anyone help me to understand this?

Would you post the headers of the message?

Steffen Kaiser -----BEGIN PGP SIGNATURE----- Version: GnuPG v1

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