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I have an e-mail address that ends in 0609. I have heard that to look professional(during interviews,in your resume, CV etc), you need to have an e-mail address that sounds professional, like using your name or some other information instead of slang words like dude_134_xyz ,cool_boy( yes these kind of e-mail addresses exist! ). If yes, does my e-mail address(some_characters firstname.lastname@example.org) sounds unprofessional. People may interpret 0609 as 69 which is something I need not to specify, which in turn may show unprofessional-ism. Actually, they are two dates of some significance to me. P.S. :- I am not ready to update my e-mail address. It is going to be a cumbersome task.