The answer is to set 'allow sending from any address' in the admin UI.
What I was trying to say is:
Users from my company are sending mails to domains that does not exist like: hotmail.co, gmailll.com.
And the messages stays in the mail queue, and the question is: Is it possible to avoid that messages of that type stays in the queue and reply to the users saying that the destination domain does not exist?
Please update your forum profile with the output of the following command (do not post the output in this thread):
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