B4X

Fetch One POP3 Message by Message Number

Demonstrates the Chilkat MailMan.FetchOne method, which retrieves one message by POP3 message number and stores it in an Email object. The arguments are headerOnly, numBodyLines, the message number (the first message is 1), and the Email. The message remains on the server. This example fetches message 1 in full.

Background: POP3 message numbers are simple 1-based positions valid only for the current session. FetchOne is the way to pull a single message straight into an Email object (rather than a bundle) when you know its position — for example after listing the mailbox. Because numbers can shift between sessions, FetchByUidl is the stabler choice when a message must be identified reliably over time.

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Dim success As Boolean = False

'  Demonstrates the MailMan.FetchOne method, which retrieves one message by POP3 message
'  number and stores it in an Email object.  The arguments are headerOnly, numBodyLines, the
'  message number (the first message is 1), and the Email.  The message remains on the server.

Dim mailman As ChilkatMailMan
mailman.Initialize("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"

'  Fetch message number 1 in full.  headerOnly=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.
Dim email As ChilkatEmail
email.Initialize

success = mailman.FetchOne(False, 0, 1, email)
If success = False Then
    Log(mailman.LastErrorText)
    Return
End If


Log("Subject: " & email.Subject)
Log("From: " & email.From)

'  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.