Event mail bug
I think the main problem here is that these event mails aren’t triggering as “read”, or seem to be under the impression that they holding an attachment. Usually, once these mails are read, they do not count against the #/10 limit. However, since the Dragon Bash mails started this has not been the case.
I’m not sure what ANet changed on their end in regard to these letters, but please go back to doing it the other way.