add a field "Account Name" to IMAP email

[georks]

Would be great to have a field to enter an account name of the e-mail account, like in pantheon-mail.
Because I can't login to my e-mail provider with my e-mail address, but with a login-name which has no "@" within the name.

Like in pantheon-mail it would be great to have these filds:

Account Name:
Login Name: <E-Mail address or login-name>
Password
...

[georks (georks)]

As a result of this, I can't configure IMAP e-mail in POA, because an "@" in the account name is mandatory, but my account name is NOT my e-mail address and does not contain any "@"

[Seth (sysfu)]

Same issue with one of my providers.

Also of note is that it's not possible to change most IMAP account settings (such as login username) after the fact via pantheon-mail, as those option are grayed out and unchangeable from the settings => 'Accounts' user interface.