Am guessing this resolved itself for you since I can see that over the past
24 hours over 97% of your traffic was happily accepted. I do see a not
insignificant amount of mail to invalid recipients so you might want to
check that you're understanding/processing bounces/deferrals properly.
On Tue, 4 Oct 2022 at 15:26, Gray, Justin via mailop
wrote:
> Hey Y’all,
>
>
>
> We’re seeing some deferred responses when sending to @cox.net recipients.
> These mostly look to be happening from our operational member email
> address, usaa.customer.serv...@mailcenter.usaa.com
>
>
>
> We’ve reached out unblock.requ...@cox.net and they were super helpful at
> first with responding, but it’s been over a week and we are still being
> deferred and haven’t seen any response to our follow up questions.
>
>
>
> They mentioned that our messages were being rejected because of a
> spf_soft_fail and a blocklist_mailfrom block, they responded later
> mentioning our address had been removed from their vendor’s mailfrom
> blocklist. I see no issues with our SPF record that would indicate it would
> be soft failing from our sending IPs. Any help would be greatly
> appreciative!
>
>
>
> Sending IPs:
>
> HOST
>
> PUBLIC
>
> prodomx1l.usaa.com
>
> 167.24.115.105
>
> prodomx2l.usaa.com
>
> 167.24.25.85
>
> prodomx3l.usaa.com
>
> 167.24.115.106
>
> prodomx4l.usaa.com
>
> 167.24.25.86
>
> prodomx5l.usaa.com
>
> 167.24.115.107
>
> prodomx6l.usaa.com
>
> 167.24.25.87
>
> prodomx7l.usaa.com
>
> 167.24.115.108
>
> prodomx8l.usaa.com
>
> 167.24.25.88
>
> prodomx9l.usaa.com
>
> 167.24.115.109
>
> prodomx1xdfw.usaa.com
>
> 167.24.97.236
>
> prodomx2xdfw.usaa.com
>
> 167.24.97.237
>
> prodomx3xdfw.usaa.com
>
> 167.24.97.238
>
> prodomx4xdfw.usaa.com
>
> 167.24.97.239
>
>
>
>
>
> Recent MTA Logs:
>
>
>
> 2022-10-04T08:45:09.441425-05:00 prodomx3l sendmail[21279]:
> 294Dbnbu016048: to=<[REMOVED]@cox.net>, delay=00:00:01, xdelay=00:00:01,
> mailer=esmtp, tls_verify=OK, tls_version=TLSv1.2,
> cipher=ECDHE-RSA-AES256-GCM, pri=151884, relay=cxr.mx.a.cloudfilter.net.
> [34.212.80.54], dsn=4.0.0, reply=421 4.2.0 usaa.customer.serv...@mailcenter.usaa.com> sender rejected. Refer to
> Error Codes section at
> https://www.cox.com/residential/support/email-error-codes.html for more
> information. AUP#CXBL, stat=Deferred: 421 4.2.0 usaa.customer.serv...@mailcenter.usaa.com> sender rejected. Ref...ion at
> https://www.cox.com/residential/support/email-error-codes.html for more
> information. AUP#CXBL
>
>
>
> 2022-10-04T08:38:55.637598-05:00 prodomx6l sendmail[2477]: 294DaPSB020129:
> to=<[REMOVED]@cox.net>, delay=00:00:01, xdelay=00:00:01, mailer=esmtp,
> tls_verify=OK, tls_version=TLSv1.2, cipher=ECDHE-RSA-AES256-GCM,
> pri=150775, relay=cxr.mx.a.cloudfilter.net. [52.73.137.222], dsn=4.0.0,
> reply=421 4.2.0
> sender rejected. Refer to Error Codes section at
> https://www.cox.com/residential/support/email-error-codes.html for more
> information. AUP#CXBL, stat=Deferred: 421 4.2.0 usaa.customer.serv...@mailcenter.usaa.com> sender rejected. Ref...ion at
> https://www.cox.com/residential/support/email-error-codes.html for more
> information. AUP#CXBL
>
>
>
> Thanks,
>
>
>
> *Justin Gray* | Information Security Engineer | Platform Threat Defense -
> SECWEB
>
> Information Security Engineering, Enterprise Security Group, USAA
>
> Cell: (512) 897-7779 | justin.g...@usaa.com
>
>
>
> USAA Classification: Public
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> intended recipient, any use, disclosure or copying of this email or any
> attachments is unauthorized. If you received this email in error, please
> immediately notify the sender and delete the email and any attachments from
> your computer.
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>
--
James Hoddinott
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