It sounds like your host. Try this,http://stackoverflow.com/questions/11988454/how-to-check-if-smtp-is-working-from-commandline-linuxFrom the website:And copy and paste the belowhello velanapps.commail from:<test@velanapps.com>rcpt to:<to_email@velanapps.com>dataFrom: test@velanapps.comSubject: test mail from command line
this is test number 1sent from linux box.Note : Do not forgot the "." at end which represents end of the message
I found this in web, and added this in Stackoverflow as many end up here.