Read Gmail POP3 Mailbox

Reads the header for each email in a GMail POP3 mailbox and displays the FROM and SUBJECT header fields. In your GMail "Forwarding and POP" settings, be sure to select "When messages are accessed with POP keep Gmail's copy in the Inbox".

Download Chilkat Ruby Library

require 'chilkat'

# The mailman object is used for receiving (POP3)
# and sending (SMTP) email.
mailman = Chilkat::CkMailMan.new()

# Any string argument automatically begins the 30-day trial.
success = mailman.UnlockComponent("30-day trial")
if (success != true)
    print "Component unlock failed" + "\n"
    exit
end

# Set the GMail account POP3 properties.
mailman.put_MailHost("pop.gmail.com")
mailman.put_PopUsername("****")
mailman.put_PopPassword("****")
mailman.put_PopSsl(true)
mailman.put_MailPort(995)

# Read mail headers and one line of the body.
# To get the full emails, call CopyMail instead (no arguments)
bundle = mailman.GetAllHeaders(1)

if (bundle == nil )
    print mailman.lastErrorText() + "\n"
    exit
end

for i in 0 .. bundle.get_MessageCount() - 1
    email = bundle.GetEmail(i)

    # Display the From email address and the subject.
    print email.ck_from() + "\n";
    print email.subject() + "\n" + "\n";

end