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Knowledgebase: outmail
What does SMTP 554 5.7.1 mean?

Problem:

What does SMTP 554 5.7.1 mean?
Resolve error message "Recipient address rejected: You have exceeded your quota"

Symptom:

Do you see SMTP Error message like the below?

Subject 'Some email subject'
Server Error: 554
Server Response: 554 5.7.1 <email@example.com>: Recipient address rejected: You have 
     exceeded your Outmail quota.

Or maybe a Microsoft Error like this?

0x800CCC79, Protocol: SMTP

Solution:

A SMTP 554 5.7.1 means you have exceeded your outMail quota. This is a permanent error and the message will not queue anywhere for a retry.

outMail customers can check their quota usage in the portal (https://portal.prolateral.com) or with the outMail usage App available in the Apple and Google App Stores.

For more information on quota limits and max burst rates can be found in the knowledge base section or clicking on the links below.

What are the quota limits and max burst rates?

How are the quota limits calculated?

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The Origin of this information may be internal or external to Prolateral Consulting Ltd. Prolateral makes all reasonable efforts to verify this information. However, the information provided in this document is for your information only. Prolateral makes no explicit or implied claims to the validity of this information. Any trademarks referenced in this document are the property of their respective owners.