When trying to reply to a request where the 'To' or 'CC' fields contain an E-Mail address starting with an underscore the following message is returned and the reply isn't sent.
Message from webpagePlease enter propper E-Mail ID:
__email@domain.com
I assume this has been caused by some field validation which was introduced during a recent upgrade. Unfortunately this is quite an annoying issue as the mailbox which receives E-Mail requests starts with 2 underscores.
ServiceDesk Plus version 7.6.0 Build 7604