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Unable to Relay Errors

Starting Monday, I have had numerous clients using McAfee Email Security report rejected emails that state:

     550 Validating Sender: bosauthsmtp17: Host ipaddress: No unauthenticated relaying permitted


     550 5.7.0 Relay Access Denied

These are all emails that they've been able to email in the past. All rejections are coming from:

Sometimes, they can resend and it goes through, and for some, they cannot. I beleive this is part of the System Change over the weekend. I will be opening a support ticket.

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1 Reply
Level 11

Re: Unable to Relay Errors

Hi Tom,

The errors you noted in your post, while delivered by our servers () are not issued by our servers.  I hope you were able to get additional information via your support request!

Best Reagrds,

Karen Widhalm

System Support Specialist

SaaS Email and Web Security

McAfee.Part of Intel Security.

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