What to do if one Exchange mailbox is flooded with spam?

Question

Microsoft Exchange

There is Exchange 2016. Recently, one of the mailboxes has been flooded with spam every day. How can the problem be solved?

Answer 1

In Exchange courses, Ilya Rud said that there was little use for built-in protection.
If you have Exchange, you should use an external spam filter.
We used ORF and in the form of add. Postfix+SA / Mdaemon + SA relays.
You can change the email address of the problem mailbox.
The procedure is crooked, but once we also used this option:
Because problems with spam are the result of an email being compromised and getting into the mailing lists.
Assign a second email address to a person, make it the main one, he corresponds with clients for a week or two, answering them at the new address, warns who needs to change the email and then delete the old one.

Answer 2

Find the answer in the first 2 links on request