[thelist] pesky mail problem

Chris Booth chris at gn.apc.org
Wed Oct 1 09:00:19 CDT 2008

Hi Bob,

"553 sorry, that domain isn't in my list of allowed rcpthosts 
(#5.7.1)" That would suggest to me that mail server at integra.net 
doesn't recognise you as someone it is allowed to relay mail from.

It's quite normal for mail servers to be configured to reject mail 
from  random sources (such a spammers) and only relay mail from known 
sources. There are various ways in which the server can recognise the 
sender (it's not enough to look at the HELO command - you could 
actually type anything there). One possibility is that it looks at 
the IP address the mail is sent from; another is to require you to 
authenticate yourself before sending mail. I think your best bet is 
to speak to integra.net and ask them what you need to do to be 
allowed to relay mail.

(The 553 message is a bit confusing, as it seems to be saying the 
problem is with the recipient's domain. As I understand it, what's 
happening is that the mail server is set up to deliver mail from 
anyone directly to certain domains. In this case "dottedi.biz" is not 
on the list of domains the server knows about, so it has to relay the 
message, ie send it on to another SMTP server which can deliver the 
message. But it is only allowed to realy mail from known sources, so 
it rejects your message.)

Hope that helps,


At 14:04 01/10/2008, Bob Meetin wrote:
>Here's where it is stalling from a shell logged into the defendant:
>-sh-2.05b$         telnet smtp.integra.net 25
>Connected to smtp.integra.net.
>Escape character is '^]'.
>220 mail.integraonline.com ESMTP
>helo whatever.com
>250 mail.integraonline.com
>HELO whatever.com
>250 mail.integraonline.com
>RCPT TO: bobm at dottedi.biz
>503 MAIL first (#5.5.1)
>mail from: bobm at whatever.com
>250 ok
>rcpt to: bobm at dottedi.biz
>553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)

Chris Booth
Araucaria Computing
Email: chris at araucaria.org.uk      Web: http://www.araucaria.org.uk 

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