There is currently no route to the mailbox database.;2;MailboxDB;0

Hi,

I have multiple mailbox servers. We are receiving emails from Gmail, Yahoo, etc.

The issue is that some users from outside (their own domain) are sending emails and their emails are stuck in a queue named

Server\Unreachable

After trying it rejects the email and users are getting this error message.

#<#4.4.7 smtp;550 4.4.7 QUEUE.Expired; message expired in unreachable destination
queue. Reason: There is currently no route to the mailbox database.> #SMTP#<o:p></o:p>

Can any one please help us in this regard?

Regards,

Anees