is there a elegant way to collect mails from external mail boxes to a mailbox hosted in plesk? like gmail offer it to fetch mails from other mailboxes?
Are you looking to fetch emails at regular intervals, or do you just want to import them from another provider into the mailboxes hosted on your Plesk server?
If it’s the latter, you can use the Site Import extension, which also allows you to import mail from external providers into your Plesk mailboxes.
More details can be found in the documentation here:
As far as I know there is no extension that serves that purpose yet. It seems that there neither is a Uservoice request. Maybe you would like to post one? Your Ideas for Plesk