Sample code for 30+ languages & platforms
JavaScript

Retrieve UIDL's from POP3 Server

Retrieve a list of UIDLs from a POP3 server. UIDLs are unique identifiers, 1 to 70 characters long, composed of characters ranging from 0x21 to 0x7E. These identifiers uniquely distinguish messages within a mailbox and remain consistent across sessions.
Note
This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.
JavaScript
var success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

var mailman = new CkMailMan();

mailman.MailHost = "pop.example.com";

mailman.PopUsername = "myLogin";
mailman.PopPassword = "myPassword";

mailman.MailPort = 995;
mailman.PopSsl = true;

var stUidls = new CkStringTable();
success = mailman.FetchUidls(stUidls);
if (success == false) {
    console.log(mailman.LastErrorText);
    return;
}

// Download each email by UIDL.
var email = new CkEmail();

var count = stUidls.Count;
var i = 0;
while (i < count) {
    // Download the full email.
    var uidl = stUidls.StringAt(i);
    success = mailman.FetchByUidl(uidl,false,0,email);
    if (success == false) {
        console.log(mailman.LastErrorText);
        return;
    }

    console.log(i);
    console.log("UIDL: " + uidl);
    console.log("From: " + email.From);
    console.log("Subject: " + email.Subject);

    i = i+1;
}

mailman.Pop3EndSession();