On botting and what ANet is doing about it

[Merendel]

The gold sellers are starting to attach small pieces of copper to mail in order to prevent you from just deleting the e-mail. =\

This was fairly common in wow and TOR as well. Mail messages would arive with 1 copper or 1 credit. I always presumed it was some attempt to get around automatic detection of the mail as spam. I think the mailspam bot from TOR was recently ported over to work on GW2 as I've noticed a similar style of formating and they seem obsessed with the "Hi friend" as the subject line. Not sure there is much that can be done about the mail spam, I suspect they are useing hacked accounts for the bulk of that anyway.