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Lucas_Metherall
Lucas_Metherall
Level 4
January 9, 2020
Question

Outlook/Hotmail soft bounce issue

  • January 9, 2020
  • 1 reply
  • 4307 views

Hi all, 

We have an engagement stream, PE 1, PE2, PE3, PE4. 

PE 1 was sent with a 99.7% delivery rate. The people are then funneled to PE 2, and it only had a 73% delivery rate. PE 3 then went back up to 99.6% delivery. I ran a smart list to see who had the soft bounces, and it is mostly Hotmail accounts, with one or two Outlook.com and live.com thrown in. 

Some sample logs:

554 5.4.7 [internal] (last transfail: 451 4.7.650 The mail server [185.28.196.157] has been temporarily rate limited due to IP reputation. For e-mail delivery information, see https://postmaster.live.com (S843) [BN7NAM10FT036.eop-nam10.prod.protection.outlook.com])

554 5.4.7 [internal] exceeded max time without delivery

Can anyone say why this might have happened? These people had emails delivered and opened before and after this occurrance. 

thanks!

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1 reply

SanfordWhiteman
SanfordWhiteman
Level 10
January 9, 2020

Are you on a shared IP?

Lucas_Metherall
Lucas_MetherallAuthor
Level 4
January 9, 2020

No, a dedicated. We use it for Aus/New Zealand, but it is separate from all other countries in the org. 

SanfordWhiteman
SanfordWhiteman
Level 10
January 9, 2020

Do you know that these are the only emails sent to Outlook.com infrastructure in that time period?

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