OUT LOOK EXPRESS DIALOG BOX SAYS "THIS MESSAGE COULD NOT BE SENT
BECAUSE ONE OF THE RECIEPIENTS WAS REJECTED BY THE SERVER. THE
REJECTED EMAIL WAS "CAPTAIN DELORIS@AOL.COM. SUBJECT" "THINKING OF
PAST FRIENDS". ACCOUNT. POPEARTHLINK.NET. SERVER"SMTPEARTHLINK,NET.
PROTOCOL:SMTP,SERVER RESPONSE:501<CAPTAIN DELORIS@AOL.COM. >:"@" OR
"." EXPECTED AFTER "CAPTAIN"PORT:25 SECURE [SSL]:NO SERVER
ERROR:501,ERROR

It appears that the email address you are sending to is invalid, since
CAPTAIN DELORIS@AOL.COM  includes a space between the words "captain"
and "deloris".

You may want to retry sending the message with the address without the
space, which would appear as:
CAPTAINDELORIS@AOL.COM

The server does not accept an email address with a space in it, which
is why it says:  "@" OR "." EXPECTED AFTER "CAPTAIN"

I hope you find this information useful and easy to understand.  If
you have questions about this answer, please do not hesitate to
request a clarification.

Many AOL screen names contain spaces in them. It works fine when
sending from one AOL account to another but does not work for email
external to the AOL system.
Contact the person you are trying to email if possible and ask them to
verify the address.

Dear Scooper38,

Have you read Captain Deloris's e-mail address from a web page or in a
mail reader where cited e-mail addresses are turned into hot links? 
In this case, the e-mail address would probably have appeared
underlined and what appeared to be a space character may in fact have
been an underscore: such underscores simply disappear into the
underlining.  In other words, the address _may_ be
"CAPTAIN_DELORIS@AOL.COM".

Carnegie

scooper38 states the same error box with the same two messages KEEPS
appearing.  I believe the situation scooper38 is describing is that
the error box keeps appearing even after another message is sent which
is valid.  The error box containing errors from a long time ago
appears anytime even new valid messages are sent.  I have had this
occur on OE for over 1 year now.  I never could solve the problem.