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UTM 9.310 detected as Open Relay

Hello,

i have the problem on customer side and in my lab that my utm is detected as open Relay? what can i do to stop this?

Check by MXTOOLBOX

NOK - SMTP Server Disconnected May be an open relay.  More Info
OK  - SMTP Banner Check OK - XX.xx.***x resolves to webmail.mydomain.de
OK  - SMTP Reverse DNS Mismatch OK - Reverse DNS matches SMTP Banner
OK  - SMTP TLS OK - Supports TLS.

Connecting to xx.xx.xx.xx

220 webmail.MyDomain.de ESMTP ready. [1342 ms]
EHLO MXTB-PWS3.mxtoolbox.com
250-webmail.mydomain.de Hello mxtb-pws3.mxtoolbox.com [64.20.227.133]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP [811 ms]
MAIL FROM:
250 OK [811 ms]
RCPT TO:

SendSMTPCommand: You hung up on us after we connected. Please whitelist us. (connection lost)

MXTB-PWS3v2 4789ms

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0 Scott_Klassen over 9 years ago

Did you click on the More Info link to the right of May be an open relay and read the information.
More Information About Smtp Server Disconnected
We were able to connect to your email server on port 25. Your server either disconnected before we sent our final QUIT command or did not respond to one of our other diagnostic commands within 15 seconds.

Additional Information

This may be due to a network problem, or could be an anti-spam feature of your email system. On it's own this warning does not point to any specific problem, but can be helpful in diagnosis when combined with other errors.


Most likely greylisting.  Per the MXToolbox instructions, "Please whitelist us", if you don't want to see this in test results.

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ACE v8/SCA v9.3

...still have a v5 install disk in a box somewhere.

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