(VB.NET) Upload (Append) Email to an IMAP Mailbox and get the UID of the Appended Email

Upload / append an email to an IMAP mailbox and get the UID of the appended email.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim imap As New Chilkat.Imap

' Connect to an IMAP server.
' Use TLS
imap.Ssl = True
imap.Port = 993
Dim success As Boolean = imap.Connect("imap.someMailServer.com")
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Login
success = imap.Login("myLogin","myPassword")
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Check the capabilities of the IMAP server.
Dim cap As String = imap.Capability()
Debug.WriteLine("IMAP capabilities: " & cap)

' If the capabilities string contains the substring "UIDPLUS", then 
' the UID of the appended email will be available in the AppendUid property (see below).

' For example, the GMail IMAP server has these capabilities (at this current time)
' * CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN 
' X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT 
' APPENDLIMIT=35882577 LIST-EXTENDED LIST-STATUS


Dim email As New Chilkat.Email

' Load the email from a .eml file.
success = email.LoadEml("myEmail.eml")
If (success <> True) Then
    Debug.WriteLine(email.LastErrorText)
    Exit Sub
End If


success = imap.AppendMail("Inbox",email)
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' If the IMAP server supports the UIDPLUS extension, then the 
' imap.AppendUid will contain the UID of the appended email.
' Otherwise AppendUid will be 0.
Debug.WriteLine("UID of appended email: " & imap.AppendUid)

' If the IMAP server does NOT have UIDPLUS, then a program can 
' first select the mailbox, get the value of the UidNext property,
' and then append.  The appended email SHOULD have a UID equal to 
' the UidNext that was obtained just prior to appending (assuming no other
' program is simultaneously appending an email to the same mailbox).

' Note: It is not required to select a mailbox to append.  The select is only
' done for the purpose of obtaining the UIDNEXT value.
success = imap.SelectMailbox("Inbox")
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


Dim uidNext As Integer = imap.UidNext

success = imap.AppendMail("Inbox",email)
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("The UID of the appended email SHOULD be " & uidNext)


Debug.WriteLine("Email uploaded to Inbox!")

' Disconnect from the IMAP server.
success = imap.Disconnect()