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Author Topic: New SMTP replies at Outlook: update your backoff to avoid reputation damage  (Read 2412 times)

WillemStam

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  • Karma: +3/-0
  • Posts: 7

On April 5th, at 5AM CET, we were alerted by a huge spike in Outlook deferrals. Please follow below link to get further insights:
https://www.postmastery.com/blog/new-smtp-replies-at-outlook-update-your-backoff-patterns-to-avoid-reputation-damage/


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deliman

  • Jr. Member
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  • Karma: +0/-0
  • Posts: 60

HI, can you explain this??

If you are using PowerMTA 4.5r6 or later then you can also use mx-rollup-list feature to consolidate Microsoft related domains into one queue. This will improve resource utilization. For example, Microsoft EU and APAC :

# Microsoft
mx eur.olc.protection.outlook.com outlook-eur.rollup
mx apc.olc.protection.outlook.com outlook-apc.rollup

whereis hotmail.com

Thanks!!
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SyedAlam

  • Newbie
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  • Karma: +1/-0
  • Posts: 6
  • I do SMTP for living.
    • Postmastery

HI, can you explain this??

If you are using PowerMTA 4.5r6 or later then you can also use mx-rollup-list feature to consolidate Microsoft related domains into one queue. This will improve resource utilization. For example, Microsoft EU and APAC :

# Microsoft
mx eur.olc.protection.outlook.com outlook-eur.rollup
mx apc.olc.protection.outlook.com outlook-apc.rollup

whereis hotmail.com

Thanks!!

hotmail.com does not resolve to above MX so it will not be included in above rollup queues.
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Syed Alam

Postmastery.com