PowerBuilder
PowerBuilder
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 PowerBuilder Downloads
integer li_rc
integer li_Success
oleobject loo_Mailman
oleobject loo_Uidls
oleobject loo_Bundle
integer n
oleobject loo_Email
integer i
li_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.
loo_Mailman = create oleobject
li_rc = loo_Mailman.ConnectToNewObject("Chilkat.MailMan")
if li_rc < 0 then
destroy loo_Mailman
MessageBox("Error","Connecting to COM object failed")
return
end if
// Configure the POP3 server connection.
loo_Mailman.MailHost = "pop.example.com"
loo_Mailman.MailPort = 995
loo_Mailman.PopSsl = 1
loo_Mailman.PopUsername = "user@example.com"
loo_Mailman.PopPassword = "myPassword"
// Build the set of UIDLs to fetch.
loo_Uidls = create oleobject
li_rc = loo_Uidls.ConnectToNewObject("Chilkat.StringTable")
loo_Uidls.Append("0000000123abcdef")
loo_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.
loo_Bundle = create oleobject
li_rc = loo_Bundle.ConnectToNewObject("Chilkat.EmailBundle")
li_Success = loo_Mailman.FetchUidlSet(loo_Uidls,0,0,loo_Bundle)
if li_Success = 0 then
Write-Debug loo_Mailman.LastErrorText
destroy loo_Mailman
destroy loo_Uidls
destroy loo_Bundle
return
end if
n = loo_Bundle.MessageCount
Write-Debug "Fetched " + string(n) + " messages."
loo_Email = create oleobject
li_rc = loo_Email.ConnectToNewObject("Chilkat.Email")
for i = 0 to n - 1
li_Success = loo_Bundle.EmailAt(i,loo_Email)
Write-Debug loo_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.
destroy loo_Mailman
destroy loo_Uidls
destroy loo_Bundle
destroy loo_Email