I also have this issue with a few extras to it…..
Not only is my email shown in the guild tab, I also have the problem of losing all information in the guild tab. It will show no players online and I am unable to do any maintenance to the guild.
I also lose all ability to use my chat. I can not see any Guild/Party or Whisper that may be in coming or out going. I get the error 42:1000:9001:4105:101 (which I know another member posted a picture of earlier)
The strange thing for me is it only happens in the evening! I can play all day time and it will work fine, but towards 6pm (uk time) I get the error and the above kicks in.
I run AVG and have the “Guild Wars 2 Special” option so I’m unsure if it’s a firewall or security issue like the error message tells me.