So far i logged in a few chars from Crom and Fury (former crom and fury, too).
All mails are gone (stuck on retrieving mail, like when there are no new mails before)
There was no character transfer, it seems the mail is wiped via the merge. And i waited a few minutes at the trader, in case they would appear.
Otherwise, guild city, guild members and even friends seem to be around...
Any official info or update on this or similar mail disappearances?