Cable Forum - View Single Post - Using smtp.ntlworld.com as smarthost fails

simbr · 14-11-2006, 13:34

Main reasons for 550 from the ntl SMTP server:

1) You're not on the ntl network
2) You've specified and invalid from: address

I'll assume the first point is moot (although, if you're on wireless it's worth checking that you haven't wandered onto your neighbours unsecured router as I've seen this happen) so it's most likely the latter. The server will accept any email address as sender as long as the format is valid, but if the address ends in @ntlworld.com then it also has to be a valid ntlworld account as well. The server will also not accept a null sender address (<>). The to: address also has to be in a valid format, but I believe the error is slightly different if you mangle the to: address so I think that option can be ignored.

14-11-2006, 13:34	#5
simbr Inactive Join Date: Apr 2005 Location: Cardiff Age: 46 Services: ntl Phone, ntl Digital TV, ntl Cable (10 Mbps) Posts: 406	Re: Using smtp.ntlworld.com as smarthost fails Main reasons for 550 from the ntl SMTP server: 1) You're not on the ntl network 2) You've specified and invalid from: address I'll assume the first point is moot (although, if you're on wireless it's worth checking that you haven't wandered onto your neighbours unsecured router as I've seen this happen) so it's most likely the latter. The server will accept any email address as sender as long as the format is valid, but if the address ends in @ntlworld.com then it also has to be a valid ntlworld account as well. The server will also not accept a null sender address (<>). The to: address also has to be in a valid format, but I believe the error is slightly different if you mangle the to: address so I think that option can be ignored.