As you know, you need to sign add-ons to be able to use it permanently, even if it is your own.
I updated an add-on and now AMO refuses to upload it because it does not like my mail address. So I changed the address (which is unintuitively done by adding second mail first then changing the primary) and AMO still complains about the mail address - so which email-adresses am I allowed to use? Do I have to try one mail address/provider after the other until one of them is good enough for AMO just to be able to use my own add-on permanently?
This really sucks, dudes....