maillog stops logging?

[Walt Thiessen]

For some unknown reason, my /var/log/maillog stopped recording entries
two days ago. There's plenty of available storage on the server ... only
about 9% has been used.

Exim_mainlog continues to record entries, but not maillog.

MailScanner continues to scan emails. I can see the results of it in
delivered emails' message source. X-org-name-MailScanner-Information
shows up in the message source.

Is there some way to turn maillog off and on that I should check?

Walt Thiessen