Verb conjugation of "regain" in English

The picture I sent yesterday was taken on the first evening. And this morning the email bounced back. The user has already uploaded 3 different pictures of himself, all with the same facial expressions.
I have sent you my e-mail address. If you want to write me there, I could view the messages immediately. It would be easier than on the Vocabulix forum, as I'm not online often enough.
I do not like London, my home is in southern England, and there is a lot of work there too. A lot of people are moving to London just for work. I've been here for 10 years and I am studying chemistry.