Visual Basic 6.0
Visual Basic 6.0
Fetch a Set of POP3 Messages by UIDL
See more POP3 Examples
Demonstrates the Chilkat MailMan.FetchUidlSet method, which retrieves the messages whose UIDLs are listed in a StringTable and appends them to an EmailBundle. The arguments are the UIDL StringTable, headersOnly, numBodyLines, and the EmailBundle. This example fetches two specific messages by UIDL.
Background: This is the efficient way to download a selected subset of a mailbox in one call — exactly the pattern for an incremental client: list the mailbox UIDLs, compare against the ones you've already stored, and fetch only the new UIDLs as a set. It avoids re-downloading messages you already have while still pulling everything new in a single operation.
Chilkat Visual Basic 6.0 Downloads
Dim success As Long
success = 0
' Demonstrates the MailMan.FetchUidlSet method, which retrieves the messages whose UIDLs are
' listed in a StringTable and appends them to an EmailBundle. The arguments are the UIDL
' StringTable, headersOnly, numBodyLines, and the EmailBundle. The messages remain on the
' server.
Dim mailman As New ChilkatMailMan
' Configure the POP3 server connection.
mailman.MailHost = "pop.example.com"
mailman.MailPort = 995
mailman.PopSsl = 1
mailman.PopUsername = "user@example.com"
mailman.PopPassword = "myPassword"
' Build the set of UIDLs to fetch.
Dim uidls As New ChilkatStringTable
success = uidls.Append("0000000123abcdef")
success = uidls.Append("0000000124abcdef")
' Fetch the listed messages (full bodies) into a bundle.
' headersOnly=0 (fetch the entire message).
' Note: numBodyLines only applies when headersOnly is 1 (it sets how many lines of the
' body to include along with the headers). When headersOnly is 0, the entire message
' is fetched and numBodyLines is ignored.
Dim bundle As New ChilkatEmailBundle
success = mailman.FetchUidlSet(uidls,0,0,bundle)
If (success = 0) Then
Debug.Print mailman.LastErrorText
Exit Sub
End If
Dim n As Long
n = bundle.MessageCount
Debug.Print "Fetched " & n & " messages."
Dim email As New ChilkatEmail
Dim i As Long
For i = 0 To n - 1
success = bundle.EmailAt(i,email)
Debug.Print email.Subject
Next
' Note: Explicitly connecting/authenticating is optional. Chilkat MailMan automatically
' connects and authenticates -- using the property settings above -- whenever a server
' operation requires it. Calling the explicit connect/authenticate methods can still be
' helpful to determine whether a failure occurs while connecting or while authenticating.