When my email was created a week ago, the administrator misspelled my last name. I went to settings to change my profile but I have been informed that when someone receives an email from me it still appears with the misspelled last name even if it´s correct in my profile.

My last name is Hamdan but it is spelled Hamdam (With an M instead of a N at the end) and my email is nayib@econduce.com. 

How can I solve this?

Thank you,

Nayib Hamdan