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Author Topic: Yahoo - 451 Message temporarily deferred  (Read 63778 times)

gregl

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Yahoo - 451 Message temporarily deferred
« on: January 14, 2012, 03:54:22 PM »
Anybody getting a higher rate of 451 soft bounces from Yahoo? On our whitelists, any delivery attempts are being soft bounced with "451 Message temporarily deferred." I'm hoping there's a temporary issue on their end. We noticed a spike in soft bounces starting yesterday.
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CaLViN

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Re: Yahoo - 451 Message temporarily deferred
« Reply #1 on: January 14, 2012, 05:00:25 PM »
I have seen deferrals for 3-4 hours today but now seems ok.
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nickphx

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Re: Yahoo - 451 Message temporarily deferred
« Reply #2 on: January 14, 2012, 06:11:16 PM »
I'm seeing an insane amount of deferrals across lots of diverse IP space.. Even gmail -> yahoo ..
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CaLViN

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Re: Yahoo - 451 Message temporarily deferred
« Reply #3 on: January 15, 2012, 10:10:05 AM »
Hotmail has some problems,too :

Quote
Error: "452 Insufficient system storage" while connected from
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CaLViN

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Re: Yahoo - 451 Message temporarily deferred
« Reply #4 on: January 16, 2012, 07:50:31 AM »
Yahoo deferrals even on RP certified ips :

Quote
Error: "451 Message temporarily deferred - [160]" while connected from
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Nuggett

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Re: Yahoo - 451 Message temporarily deferred
« Reply #5 on: February 28, 2012, 09:51:25 AM »
We have seen an increase in 451 Message temporarily deferred - [160] for the past month. Which is very strange and seen a 20% drop in the inbox deliverability.
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nickphx

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Re: Yahoo - 451 Message temporarily deferred
« Reply #6 on: March 23, 2012, 04:46:03 PM »
451 / [160] after data usually means yahoo didn't like your message content or domains in the message body.
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