I can not send out my emails! How can I fix it.

If I type an email and send it, the messge does not appear in the Sent Items list. How do I fix the problem? 10 points goes to anyone who can help me.

Below is a sample of the error messages I get when I try to send an email direct or as a reply. Help!! Hi. This is the qmail-send program at yahoo.com. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error...

I have a ymail.com address and any time (for about a month now) that I try to send an email to anyone with a Sympatico address, the message comes back to me.. Does anyone know what the reason for this may be.. I've contacted yahoo and they say it has...

My email account doesn't ask me for the character string each time, only every 4 or 5 times I send a message. But now, I can only send messages after I enter the character string. It's very frusterating. It says "Internal HTTP service code 500"...

I have adjusted all the settings that I can figure out, but everyone complains they can not read my *Greek* emails! (When I type the message it shows in English to me.)Thank you so much for the help.

it has happened with everyone computer in my house, Have cleared cookies and still happens, but can hook up laptop to friends router and it works fine,

i think i opened a bad email, now my comp.is sending out bogus emails to my list of friends

A few days ago I was sending my emails and then on the same day asked to enter in the code and when I enter it correctly it tells me there is suspicious activity on my account. Now I have work things that come to my yahoo address and I cant reply. Please...