p231970

Results 4 issues of p231970

ESET Internet Security 14.0.22.0 reports about trojan WIN64/Exploit.CVE-2020-16907.A ![Screenshot_5](https://user-images.githubusercontent.com/22105994/97696802-2494c900-1ab7-11eb-8e26-b3281295ff14.png)

to make it working in case UndeliveredMessagePart is not of type MessagePart

I have this System.InvalidCastException: Unable to cast object of type 'MimeKit.TextPart' to type 'MimeKit.MessagePart'. at MailBounceDetector.BounceDetectResult..ctor(MimeMessage message, MimeEntity deliveryNotification, MessageDeliveryStatus deliveryStatus, MimeEntity undeliveredMessagePart) at MailBounceDetector.StandardBounceDetector.Detect(MimeMessage message) at MailBounceDetector.BounceDetector.Detect(MimeMessage message)

I got extended delivery status code which crashes detector. `Action: failed` `Status: 5.7.133` `Diagnostic-Code: smtp;550 5.7.133 RESOLVER.RST.SenderNotAuthenticatedForGroup; authentication required; Delivery restriction check failed because the sender was not authenticated when...