Question Change Email Domain

[lucflash]

Hey everybody,

i hope i choosed the right forum for my question.
we used the plesk migration manager to transfer confixx users to plesk onyx. the mail conversion was set to short-names so everything can be used without any changes to made at the user preferences

what we had at confixx:

domain: example.com
mailbox: web5p1 and web5p2
email adress: a1@example.com (to web5p1), a2@example.com (to web5p1), b1@example.com (to web5p2)

what we have in plesk:

web5p1@web5.serverdomain.com (no alias, no forward)
web5p2@example.com with alias b1@example.com
a1@example.com forwarded to web5p1@web5.serverdomain.com
a2@example.com forwarded to web5p1@web5.serverdomain.com


Question: Is there any chance to edit the domain of adress web5p1@web5.serverdomain.com afterwards to web5p1@example.com? In this way we could put a1@ and a2@ as alias for this address

Thanks four your help
Kind regards