Missing mail feature

[ghermans]

At this point managing mail has not been implemented.(https://docs.plesk.com/en-US/12.5/api-rpc/reference/managing-mail.34477/)

@sibprogrammer are you planning to add this ?

[sibprogrammer]

I hope yes :)

[beatbesmer]

We would be happy too if getting, modifying, renaming etc would be available

[sibprogrammer]

Two last merges were referenced by mistake.

[sibprogrammer]

The basic CRUD operations are available. Future improvements are the subject of separate requests.