In order to deal with this we are going to take advantage of Zend_Mail??™s ability to read mail messages by
monitoring a support email account and add issues to the support tracker.
Before we look at the requirements for this new feature in our application let??™s take a short look at some of
the components of collecting and storing email.
9.4.1 Email collection and storage
In our earlier background on email we noted that Ernie collected his invite from Bert using POP3 however he
could have just as likely used the other main email collection protocol IMAP (Internet Message Access
Protocol). Since Zend_Mail can work with both we??™ll take a look at the differences between the two.
POP3 and IMAP
Our two characters Bert and Ernie both make use of these two protocols to access their mail and in figure 9.5
we can see a the basic difference between Bert??™s use of IMAP to get his mail and Ernie??™s use of POP3. As
Ernie works out of a home office and rarely needs to access his mail from anywhere else, he uses POP3 while
Bert, who is always on the move, relies on his mail to be available wherever he is, so he uses IMAP.
Figure 9.5 Comparing the main difference in email collection between POP3, which works on a simple connect, collect, disconnect
relationship, and the more capable IMAP.
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