I have written an jsp application to accept a "To" address and a file attachment from a user and send email to the recipient. After the request is processed, the jsp program redirects user to a confirmation page.


I encounter a problem when uploading large files (> 10 meg). While the file is successfully uploaded to a temporary location on the server, the emailing itself behaves arbitrarily: the jsp program instead of redirecting to confirmation page gives an "Cannot find server". And what is more freakish is that sometimes the email with attachment is sent successfully, sometimes the email has a corrupted attachment file and sometimes the email is not sent at all. I have checked that there are no file size restriction on my smtp server setup. Any help about how to make the jsp program robust and guarantee delivery of email with attachement will be appreciated.