Zixmail.com:
"As you may already be aware, SecureDelivery.com is now ZixMail.net. Many enhancements to the secure email delivery service we provide are coming your way, including the ability to add attachments, get time stamped pick-up receipts, forward secure emails you receive, send almost unlimited file size attachments (up to 10MB currently), and many more.

"Effective Friday, May 4th 2001, you will no longer be able to use ZixMail.net to send secure emails for free. Your recipients will always be able to receive your secure messages at no charge. However, for you to continue to send secure emails, with attachments, your cost is only $24 per year....That's less than 7 cents a day..."