Unfortunately the EU thread got shutdown after an “over-pull” as you’ve seen earlier, it’s a difference in policies we assume. All EU help must go through tickets, self clearing or the US optional thread.
@Farandris you were answered in your own thread:
https://eu.forums.blizzard.com/en/wow/t/mail-box-bugged-so-i-cant-transfer-from-overcrowded-server/388922/2