Question cloud memory per postfix or imap/smtp sofware

[webstudio19]

hi

I wonder if I can use an AWS Amazon Cloud space for mail (Postfix and Imap courier or other Plesk mail software) to store mail
as you can imagine I have problems managing the imap saddles and the memory it occupies on the server disk
today the mail goes here
/var/qmail/mailnames

And if so, what type of AWS service should I purchase? see Attachment

thanks!!