On Thu, 2 Nov 2017 09:31:22 -0400, "KK4QBN" 
wrote:

>Do you believe this is from a bot accessing your system?
>
>11/2 08:55:53 evnt QWK NetMail from VERT to =?utf-8?B?5ZSQ6I+K?=         
>11/2 08:55:53 evnt !QWK NetMail from VERT to UNKNOWN USER:
=?utf-8?B?5ZSQ6I+K?=
>

That's an RFC 1342 encoding method for SMTP headers that only accept
regular ASCII characters. 

Just sticl that utf string into Google and it'll pop up all sorts of
stuff about it.

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