Add the option to change your initial email address or give the choice to have more than one additional address
Most people set up their email address at an early age and it is something fun or thoughtless which does not then bode well when moving through the professional world; I think its a great idea giving the option to add a secondary address, however, I'd guess most like me now use their secondary as their main address. I am now getting married and need to change my address as it currently includes my maiden name, but in doing that I run the risk of loosing all emails that currently come to the secondary address. I don't want to set up a brand new account, so an option to have another alias would be beneficial, or to be able to change the initial 'childish' account name

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Hexo Kali commented
And I can't remove an existing email alias
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Hexo Kali commented
Very Important!!!!!!!!!!