Unable to send mail using iCloud under wifi...only under £G

Hi everyone

I can send mails using iCloud @me account only under 3g, with the wifi of my home connection i'm unable to connect to p05-smtp.mail.com..does anybody know why?

Only my iPhone under 3g can send mails with @me icluoud account...even my mac and my iPad, which are connected to my home lan are unable to connect to the outgoing mail server...

can anyone help me?

thanks