I (https://en.wikipedia.org/wiki/User:GRuban) am not able to send or receive Wikipedia email using the EmailUser interface .
I tried emailing several other users, and they never got anything (and I never got copies of the emails). I tried emailing myself, with the same (lack of) results. I even changed my email address, twice, and retried Wikipedia email still getting the same (lack of) results.
Now I seem to be locked out of EmailUser, and am getting
From Wikipedia, the free encyclopedia
As an anti-abuse measure, you are limited from performing this action too many times in a short space of time, and you have exceeded this limit. Please try again in a few minutes."
though it's been a day since the last time I tried to mail anything.