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"550 Access denied - Invalid HELO name" when emails are sent to certain domains

Hi,

I've noticed recently that when emails are being sent to certain domains from our Exchange Server they are failing a HELO check. Our emails our going through the Astaro SMTP proxy, all emails going out from the proxy are doing so via one IP address and I have checked that this IP address is not blacklisted anywhere. Also the the IP address associated with sending out email has a public DNS record.

Any help appreciated.

Thanks

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0 Ol Deda over 12 years ago

I'm sure like Bob said that response is from UTM. You have some wrong configuration in exchange
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0 turboizzy over 12 years ago in reply to Ol Deda

I agree with you Bob, seems like a dodgy domain. Not had any issues sending emails to any domains previously. Thanks for your feedback
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0 turboizzy over 12 years ago in reply to Ol Deda

I agree with you Bob, seems like a dodgy domain. Not had any issues sending emails to any domains previously. Thanks for your feedback
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