PowerShell

Fetch a Set of POP3 Messages by UIDL

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.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  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.

$mailman = New-Object Chilkat.MailMan

#  Configure the POP3 server connection.
$mailman.MailHost = "pop.example.com"
$mailman.MailPort = 995
$mailman.PopSsl = $true
$mailman.PopUsername = "user@example.com"
$mailman.PopPassword = "myPassword"

#  Build the set of UIDLs to fetch.
$uidls = New-Object Chilkat.StringTable
$uidls.Append("0000000123abcdef")
$uidls.Append("0000000124abcdef")

#  Fetch the listed messages (full bodies) into a bundle.
#  headersOnly=$false (fetch the entire message).
#  Note: numBodyLines only applies when headersOnly is $true (it sets how many lines of the
#  body to include along with the headers).  When headersOnly is $false, the entire message
#  is fetched and numBodyLines is ignored.
$bundle = New-Object Chilkat.EmailBundle

$success = $mailman.FetchUidlSet($uidls,$false,0,$bundle)
if ($success -eq $false) {
    $($mailman.LastErrorText)
    exit
}

$n = $bundle.MessageCount
$("Fetched " + $n + " messages.")

$email = New-Object Chilkat.Email

for ($i = 0; $i -le $n - 1; $i++) {
    $success = $bundle.EmailAt($i,$email)
    $($email.Subject)
}

#  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.