Cable Forum - View Single Post - Server Error: 550, Error Number: 0x800CCC79

**Paul** · 02-10-2006, 02:02

If you check the message it tells you he was using smtp.ntlworld.com, port 25

I would guess the problem might be the address you had defined as your sender/return address, I believe this must be a valid ntlworld.com address to prevent spoofing - and you might get that anti relaying message if it wasn't.

02-10-2006, 02:02	#4
Paul Dr Pepper Addict Cable Forum Admin Join Date: Oct 2003 Location: Nottingham Age: 63 Services: Zen & YouFibre FTTP, Sky Q TV, Sky Mobile, Flextel SIP Posts: 31,304	Re: Server Error: 550, Error Number: 0x800CCC79 If you check the message it tells you he was using smtp.ntlworld.com, port 25 I would guess the problem might be the address you had defined as your sender/return address, I believe this must be a valid ntlworld.com address to prevent spoofing - and you might get that anti relaying message if it wasn't. __________________ Baby, I was born this way.