Hi all,

There's a problem regarding our email server for which the following info was shown out, anyone knows what's meant ? And how to solve it, urgrent and thanks !

Keith

>The original message was received at Fri, 1 Sep 2006 10:44:55 +0800
>> from aworklan001169.netvigator.com [203.198.151.169]
>>
>> ----- The following addresses had permanent fatal errors -----
>> <rubybrta@netvigator.com>
>> (reason: 550 5.7.1 <rubybrta@netvigator.com>... Rejected: Spam email

from server IP 218.189.131.206 is blocked by Outblaze. Please go to
http://spamblock.outblaze.com/218.189.131.206 for IP unblock request.)

>>
>> ----- Transcript of session follows -----
>> ... while talking to imsmx04.netvigator.com.:
>
>>>>> >>> DATA
>
>> <<< 550 5.7.1 <rubybrta@netvigator.com>... Rejected: Spam email from

server IP 218.189.131.206 is blocked by Outblaze. Please go to
http://spamblock.outblaze.com/218.189.131.206 for IP unblock request.

>> 550 5.1.1 <rubybrta@netvigator.com>... User unknown
>> <<< 503 5.0.0 Need RCPT (recipient)

It looks like your IP address is blocked by outblaze, is your IP address dynamically provided by your ISP? You can try using your ISP's SMTP server to relay your mail so that it doesn't get blocked by recipients.

Also, please don't mark posts as urgent.

thanks gilead, please show me the steps for how to do it as I really don't know. the IP is provided by our ISP, is it you mean smtp.ourISPdomain.com something like that to send mails ? where I should edit the config files ?

Thanks
Keith

Are you using sendmail to send your mail? If so, and you're using sendmail.mc and m4 to generate sendmail.cf, add the following line to sendmail.mc and regenerate sendmail.cf:
If you edit/build sendmail.cf by hand, you can add/modify the DS setting in sendmail.cf:

really thanks gilead !

Thanks gilead, however, I have seen the sendmail.mc already has a line "dnl define(`SMART_HOST',`mail.ISPdomain.com')", and also I read the file that there's a line "FEATURE('blacklist_recipents')dnl", is it meant that I can either put an email address or an IP address that I don't want to receive emails from them to replace 'blacklist_recipents' and more than 1 line of this in the sendmail.mc ?

After that, I also take reference from books and the code for the regeneration :
m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

after the typing of :wq! of sendmail.mc

Besides, how to check that the email server is being used by someone to send spam and unlist from the black list ?
Thanks

If you're already using your ISP as a smarthost it could be that Outblaze had a temporary block on them. I'd go to the URL they gave to have the IP address submitted for unblocking.

The blacklist_recipients feature looks up recipients as well as senders in the access database. You can use it to set access for your recipients (/etc/mail/access & /etc/mail/access.db). This also requires FEATURE(`access_db'). You can use m4 to generate the .cf file, or if you have the sendmail sources installed you can change to the cf/cf directory and use the build script which can build and install it for you.

You /var/log/maillog file should have the sending IP address as well as the email sender/recipient info. Hopefully, you can match the time stamps there against the error emails to see who is sending them.