Sending out email from a web page

[Jimbo]

Hey

Ive been looking at Linked in. It seems that when i invite a friend the
"From" address is my email address and the "To" address is my friends
email address, when my friend receives the email.

This is cool, so i wanna do this on the web site that im currently
working on, so that people can invite other people. But it seems like
this is not without problems:

1. When the From address is from the same domain as the To address,
sometimes the mail gets blocked.

2. Because of me, changing the header from address, it seems like the
mail is considered as SPAM.

Now why am i experiencing all these problems?

How does Linked in do?

How do i get about these problems?
Best Regards
Jimmy

[Jimbo]

Ok, but i guess that Linked-In must have the same problem then?

I made a test with Linked-In that showed that they didnt have the same
problem. So i really do not understand why i have that problem and
others have not?

Of course i cannot see what they put into their headers, but the sender
must be Linked-In no matter what they put in, right?

Also i tried to complete Reply-To, Errors-To and Sender. It doesnt seem
to make a difference?
Best regards
Jimmy