toshiba e 740 wifi sending email problem

Dear folks, I am real new at this, so here goes.
I have a Toshiba E 740 with wifi. I went to a hotspot and was able to surf the net and receive an email I had sent to myself from my home computer. HOWEVER, I can not SEND email to anyone from the pda.
I write the email and press send and the pda indicates it is sending and receiving. Then I get a error message which says it was unable to send the message to an unauthorized recipient, or some note like that.
I checked my pop3 incoming and outgoing mail lines and they seem to be correct. Help anyone? Thanks, Ted

A lot of wireless hotspots block the ability to send email. retrieve and read, yes. Send, hell no.

The reason being that joe.spammer could sit outside a hotspot in his car and spam away to his heart's content, and then drive away leaving little trace

It's unfortunate that the bad apples have to ruin it for everyone else, and is only one explanation of why (albeit the most common), but I'd suggest perhaps using a webmail interface if you could? Webmail interfaces such as webmail.ihug.co.nz are often allowed as it's too time consuming and difficult for a spammer to use compared to a mail client...

Whetu, Thanks very much. I do think this is the answer to my Q.
A minor issue that was just driving me nuts. Ted