Gets the message arrival date.
A DateTime value of the message arrival moment from "Arrival-Date" DSN field, or MinValue if no such field contained in the DSN.
This field indicates the date and time at which the message arrived at the Reporting MTA.
In this example, DSN field is:
Arrival-Date: Wed, 8 Feb 2010 20:01:10 +0000
The return value will be defined from the text marked bold.
DsnAttachment Class | MailBee.BounceMail Namespace | ArrivalDateAsString