Visual FoxPro

Get the POP3 UIDL of an Email

Demonstrates the read-only Chilkat Email.Uidl property, which contains the unique message identifier assigned by a POP3 server; the value is also represented by the X-UIDL header field. This example sets X-UIDL directly to illustrate how it maps to the Uidl property (normally the value comes from the POP3 server during download).

Background: A UIDL ("unique ID listing") is POP3's stable identifier for a message in a mailbox — it stays the same across sessions, so a client can remember which messages it has already downloaded and avoid fetching them again. Note this is POP3-specific: IMAP uses its own UID instead, which Chilkat stores in the ckx-imap-uid header rather than in Uidl.

Chilkat Visual FoxPro Downloads

Download Chilkat for Visual FoxPro

Visual FoxPro

LOCAL loEmail

*  Demonstrates the read-only Email.Uidl property, which contains the unique message
*  identifier assigned by a POP3 server.  The value is represented by the X-UIDL header
*  field.  Here we set X-UIDL directly to show how it maps to the Uidl property.

loEmail = CreateObject('Chilkat.Email')

*  Normally the POP3 server assigns this; we set it here for demonstration.
loEmail.AddHeaderField("X-UIDL","0000000123abcdef")

? "Uidl = " + loEmail.Uidl

RELEASE loEmail