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jig1
Level 7

553 Invalid recipient events messages

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Today I was alerted by some of our users they were not getting some emails.

I checked the event logs and noticed the messages they were expecting had the following SMTP response:

553 Invalid recipient

The weird thing is our users are valid and they have been getting emails all day.  The only thing I noticed was the subject line was empty.

Thanks.

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kwidhalm
Level 11

Re: 553 Invalid recipient events messages

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Hello jig1 -

There was an issue this past weekend that caused some customers to experience 553 Invalid Recipient errors.  This issue has since been resolved.  If you require any additional information on the issue, please log a service request with support.

Best Regards,

Thank you,

Karen Widhalm

System Support Team

McAfee, Inc.

SaaS Email & Web Security Technical Support

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frankm
Level 10

Re: 553 Invalid recipient events messages

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This has been a recurring problem for one of our clients since last September. It seemed to stop, when we stuned off Deny for invalid users. Support had found a few issues, but we have not verified if the fixes have worked completely.

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kwidhalm
Level 11

Re: 553 Invalid recipient events messages

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Hello jig1 -

There was an issue this past weekend that caused some customers to experience 553 Invalid Recipient errors.  This issue has since been resolved.  If you require any additional information on the issue, please log a service request with support.

Best Regards,

Thank you,

Karen Widhalm

System Support Team

McAfee, Inc.

SaaS Email & Web Security Technical Support

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