PHP Mail not sending emails to a select address

[Nucleo]

Hello,
I have a website hosted at www.domain.com , within it, a contact form which uses PHP's mail command.

If I set the TO: email to [e-mail] I receive the email, if I try to send an email to [e-mail] I dont receive anything?

Can anyone have a stab as to why this is happening?

Emails can be received on the account, junk filers are turned off and there is nothing in the junk box. It seems to be something to do with the PHP config I just can't put my finger on what.

Thanks all.

[rocknbil]

Are the To and the From the same address? It's a long shot, but I have been on a few systems where this won't send. Create a second test account on this domain and try it, [e-mail] and [e-mail].

[mack]

This is quite interesting, because I had a similar issue using the php mail command. Most addresses worked fine, some just didn't receive the mail. I thought it must be due to the email address its self, but could never solve it.

Mack.