I have a mail in text plain, how i can imap_fetchstructure() ?

Hello, I have a list of mails taken from my old host in cPanel Now i want read this messages, and they are in text plain. Wath i can do ? I submit each message to me BD MySQL, but when i do this:[PHPNET]SELECT * FROM mails WHERE...[/PHPNET] And after[PHPNET]imap_fetchstructure($mail);[PHPNET]This only ERROR. Say: Warning: imap_fetchstructure(): supplied argument is not a valid imap resource in /home... AND [PHPNET]imap_fetchstructure($mail,0);[PHPNET]Is = AND [PHPNET]imap_fetchstructure($mail,1);[PHPNET]Is = How i can read this mail in MySQL or textfile ? The point is do imap_fetchstructure() becouse some mails have Files. Thanks.