I'm new to the IMAP protocol and Zend_Mail_Storage and I'm writing a small php script for a cron job that should regularly poll an IMAP account and check for new messages, and send an e-mail if new messages have arrived.
As you can imagine, I want to only poll the IMAP account for relevant messages, and I only want to send a new e-mail if new messages have arrived since the last polled new message. So I thought of keeping track of the last message I polled with some unique identifier for a message.
But I'm a bit uncertain about whether the methods I want to utilize for this do what I expect them to do though.
So my questions are:
Does the iterator position of Zend_Mail_Storage_Imap actually resemble some IMAP unique identifier for messages, or is it simply only and internal position of Zend_Mail_Storage_Abstract? For instance, if I tell it to seek() to message 5 (which I stored from an earlier session) will it indeed seek to the appropriate message on the IMAP server, even if for instance messages have been deleted since last session?
Would keeping track of this latest polled message id in a file suffice for a cron job that, say, polls the account every 5 or 10 minutes? Or is this too naive, and should I be using a database for instance.
Or is there maybe a much easier way to keep track of such state with Zend_Mail_Storage_Abstract?
Also, do I need to poll every IMAP folder? Or is everything accumulated when I poll INBOX?
If you could shed some light on any of these matters, I'ld appreciate it. Thanks in advance.
