Is there any available implementation of POP3/IMAP server in PHP?
I am handling my e-mail service using sendgrid. I am going to store the messages on my server using files/db/whatever and now I'd like to provide full POP3 or IMAP (preferable) access for my users to their mailbox. Is there such implementation in PHP? Or is there any other possibility to run POP3/IMAP in the distributed environment of Windows Azure (assuming I have the mailboxes stored in shared blobs/tables/db)?