(Tcl) Fetch Oldest/Newest IMAP Email

Emails may be downloaded by sequence number. Assuming the selected mailbox is not empty, the oldest email is at sequence number 1, and the newest email is at sequence number N. The FetchSingle method may be used to download by sequence number.

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load ./chilkat.dll

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

set imap [new_CkImap]

# Connect to an IMAP server.
# Use TLS
CkImap_put_Ssl $imap 1
CkImap_put_Port $imap 993
set success [CkImap_Connect $imap "mail.testemail.net"]
if {$success != 1} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Login
set success [CkImap_Login $imap "***" "***"]
if {$success != 1} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Select an IMAP mailbox
set success [CkImap_SelectMailbox $imap "Inbox"]
if {$success != 1} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# After selecting a mailbox, the NumMessages property
# contains the number of emails in the selected mailbox.

set n [CkImap_get_NumMessages $imap]

if {$n > 0} then {

    # The oldest email is always at sequence number 1.
    set isUid 0

    # oldestEmail is a CkEmail

    set oldestEmail [CkImap_FetchSingle $imap 1 $isUid]
    if {[CkImap_get_LastMethodSuccess $imap] == 1} then {

        # Display the From and Subject
        puts [CkEmail_fromAddress $oldestEmail]
        puts [CkEmail_subject $oldestEmail]

        puts "--"
        delete_CkEmail $oldestEmail

    }

    # The newest email is at sequence number N:
    # newestEmail is a CkEmail

    set newestEmail [CkImap_FetchSingle $imap $n $isUid]
    if {[CkImap_get_LastMethodSuccess $imap] == 1} then {

        # Display the From and Subject
        puts [CkEmail_fromAddress $newestEmail]
        puts [CkEmail_subject $newestEmail]

        delete_CkEmail $newestEmail

    }

}

# Disconnect from the IMAP server.
set success [CkImap_Disconnect $imap]

delete_CkImap $imap