Getting msg email "not read" when it has been read

[ShellyM]

I am receiving an email msg that my email was "not read" when the email was read and responded to by the recipient. The "not read" email msg comes weeks, sometimes months after the email has been sent. Why is this happening and how can I be sure that my emails are actually ibeing received and read? I do have the "read receipt" option checked, but not all recipients say yes to that question.

Any help would be appreciated.

[virtualmike]

Are they all coming from the same email system (the part after the @ sign in the email address)? Or are you getting this from a variety of email systems?

[kgc]

Exactly what does the email look like? Perhaps your client is letting you know that the 'Read Receipt' for that message was never received.

[dane]

Read receipts don't generally work, you should probably turn that option off.

[ShellyM]

The @location is the same for all emails. The message appears to be system generated. Here is what is in the msg:

"Your message was deleted without being read on Friday, May 25, 2012 7:25:04 PM (GMT-08:00) Pacific Time (US & Canada)."

The email that this above message is referring to was in fact, read and responded to by the recipient.

[virtualmike]

Yes, that sounds like an unreliable mail server for that particular location. You could try informing your correspondents at that location so they can refer it to the system administrator, but as Dane noted, in general, email receipts are not particularly reliable. My mail client never sends receipts.