Read receipt requests are generally an extremely unreliable way to find out if your recipient has read an email messages that you have sent to him/her.

Why? Because

• Some email programs do not support read receipts, and thus messages viewed with these would never send you a notice that the message was read.
• Programs that do support read receipts allow the user to respond to them “always”, “never”, or “ask each time” … with “asking each time” being the default.  As a result, users often will decline your request for a receipt that you have read the message.

However, when messages are sent via LuxSci’s SecureLine Escrow encryption service, read receipts are guaranteed to work.

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