http://mail.google.com/support/bin/answer.py?answer=10313&topic=1564
Am I receiving someone else's email?
Gmail doesn't recognize dots (.) as characters within a username. This way, you can add and remove dots to your username for desired address variations. messages sent to your.username@gmail.com and y.o.u.r.u.s.e.r.n.a.m.e@gmail.com are delivered to the same inbox, since the characters in the username are the same.
Keep in mind that hyphens (-) and underscores (_) can't be used in a Gmail address.
If you created your account with a dot in your username and you wish you hadn't, you can change your 'Reply-to address.' To change your reply-to address:
Click 'Settings' at the top of any Gmail page.
Enter your username@gmail.com without a dot in the 'Reply-to address' field.
Click 'Save Changes.'
When you log in to Gmail, you need to enter any dots that were originally defined as part of your username.
Am I receiving someone else's email?
Gmail doesn't recognize dots (.) as characters within a username. This way, you can add and remove dots to your username for desired address variations. messages sent to your.username@gmail.com and y.o.u.r.u.s.e.r.n.a.m.e@gmail.com are delivered to the same inbox, since the characters in the username are the same.
Keep in mind that hyphens (-) and underscores (_) can't be used in a Gmail address.
If you created your account with a dot in your username and you wish you hadn't, you can change your 'Reply-to address.' To change your reply-to address:
Click 'Settings' at the top of any Gmail page.
Enter your username@gmail.com without a dot in the 'Reply-to address' field.
Click 'Save Changes.'
When you log in to Gmail, you need to enter any dots that were originally defined as part of your username.
