On my client's site, Theme My Login won't send out any user registration/admin notice/password change emails. I put Theme My Login on the same site (the development one) on my server, and emails arrive immediately with the same plugins in use.
I tried disabling all the plugins on my client's site except Theme My Login, to see if something was conflicting, and still no emails.
I tried adding a new user manually in the backend in the client's site and I did get the emails right away.
Please help, I don't know what else to try. My client's site: