read reciepts

[JACOB]

I have an interesting question; is there a way to sort or have a report from
all "sent mail" with "read receipt request" that I did not get a read proof?
So I can follow up which mail was not read yet?

 

[Tom [Pepper] Willett]

Since many, if not most, users don't send read receipts, it would be rather
difficult.
:I have an interesting question; is there a way to sort or have a report
from
: all "sent mail" with "read receipt request" that I did not get a read
proof?
: So I can follow up which mail was not read yet?
: