Any AV settings that might block the incoming mails?

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Same anti-virus (Eset) that's been used for years, one day emails just stopped. They're sitting there on the server, if the anti-virus was blocking something I would expect a Send / Receive error but no error and Send / Receive completes successfully but no new mail is brought down.


My next step is to delete the profile and recreate it but it's such a nuisance but it's the only thing I haven't tried.