Just had a client ask for a new email account with two dots (or periods) in the name, ie: j.k.@rowling.com. Well it turns out that though it doesn’t specifically say so, you can’t have a period or dot immediately preceding the @ symbol.
“This is a limitation of the system. You can name the user a.m@yourdomain.com, but a username cannot end with a dot.
Another Google support guy adds:
“I’ve reproduced the issue on my end and I can confirm that the second dot ‘.’ is causing the issue. After further researching I can also confirm that this is an expected behavior. The Help Center article you’ve provided (https://support.google.com/a/answer/33386?hl=en) is giving examples such as: user.name, or us.er.na.me but without a dot ‘.’ placed in front of the @ symbol.
To summarize:
-a.m@iprc.org will be accepted;
-a.m.@iprc.org won’t be accepted because of the dot in front of the @ symbol.”
So there you go. No luck, b.j.@mash4077.mil (assuming you’re hosted on Google Apps).