B4X Requires Chilkat v11.0.0+

How to Download Messages in MessageSet One at a Time

See more IMAP Examples

If a message set contains a huge number of emails, it's NOT a good idea to try to download all at once into an email bundle using a method such as FetchBundle. It's better to iterate over the messages in the set to download one by one. B4X

Dim success As Boolean = False

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

Dim imap As ChilkatImap
imap.Initialize("imap")

'  Connect using TLS.
imap.Ssl = True
imap.Port = 993
success = imap.Connect("imap.example.com")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Authenticate
success = imap.Login("email_account_login", "email_account_password")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Search for messages and return a set of matching messages.
'  (This example will simply search for ALL messages.)
Dim fetchUids As Boolean = True

Dim messageSet As ChilkatMessageSet
messageSet.Initialize
success = imap.QueryMbx("ALL", fetchUids, messageSet)
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


Log("Number of messages = " & messageSet.Count)

Dim email As ChilkatEmail
email.Initialize
Dim i As Int = 0
Do While i < messageSet.Count
    success = imap.FetchEmail(False, messageSet.GetId(i), fetchUids, email)
    If success = False Then
        Log(imap.LastErrorText)
        Return
    End If


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

    i = i + 1
Loop

Log("OK")