Re: 550 5.7.1 Unable to relay to External Users

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"Jamie" <Jamie@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

[ snip ]

>When I telnet to their server from my exchange box I get booted as soon as I
>hit enter after mail from:user@xxxxxxxxxxxxx I don't even get a chance to
>tell earthlink's server who it is that I have mail for.

Then Earthlink is probably using a RBL that's misidentified your IP
address as belonging to a block of addresses that are dynaimcally
assigned . . . or they've added your IP address to their own list of
addresses they don't want to talk to.

>> >We are not on any list that I can see though and I tested our
>> >server with several methods it is not relaying.
>>
>> Try http://www.dnsstuff.com and see if your IP's listed on one of the
>> RBL's they check.
>
>I did test it previously and we are not on any list.

You're on somebody's list. Whether it's a publically available list,
or if it's a list that those RBL checkers don't know about, is another
question.

In any case, it's something that only you and Earthlink can resolve.

[ snip ]

>> Sending an e-mail to the address in the 550 message wouldn't be a bad
>> place to start.
>
>I can't send to that address from with in my domain.

So get a throw-away account on Hotmail/MSN/Yahoo!/etc. and use that.

>Perhaps this is limited
>to earthlink but it appears that the SMTP Error Log shows alot of these types
>of errors since I bumped the Logging to Maximum level trying to figure out
>this problem.

Try the SMTP Protocol Log.

>Someone told me that this is normal opperation for all there
>errors to show up I find it strange but I am seeing this error logged on my
>exchange server for messages that were successfully sent and recieved on the
>other end:
>
>Below is from my event logs on my exchange FE server for when I try to send
>to my earthlink account from work, so it appears that my exchange box is able
>to issue more commands than I can during telnet session as I stated I get
>booted after I issue the mail from command:
>
>This is an SMTP protocol log for virtual server ID 1, connection #1601. The
>client at "192.168.0.7" sent a "rcpt" command, and the SMTP server responded
>with "550 5.7.1 Unable to relay for myaccount@xxxxxxxxxxxxx ". The
>full command sent was "rcpt TO:<myaccount@xxxxxxxxxxxxx>". This
>will probably cause the connection to fail.
>
>This is baffling me.

The SMTP Protocol Log will have more information. With only that
information I can't tell if it's your FE server telling you that the
"client" (the machine at 192.168.0.7) was refused, or if the RCPT
command sent to Earthlink was refused. I also don't know who
192.168.0.7 is -- an Exchange server or some other SMPT client.

--
Rich Matheisen
MCSE+I, Exchange MVP
MS Exchange FAQ at http://www.swinc.com/resource/exch_faq.htm
Don't send mail to this address mailto:h.pott@xxxxxxxxxxxxx
Or to these, either: mailto:h.pott@xxxxxxxxxxxxxxx mailto:melvin.mcphucknuckle@xxxxxxxxxxxxx mailto:melvin.mcphucknuckle@xxxxxxxxxxxxxxx
.

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