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[jmendoza]

Hello,

I migrated our PMTA server to an Azure virtual machine instance with new IPs. I've verified SPF, PTR, and sender score and everything looks good so far but still seeing '[TSS04] Messages from x.x.x.x temporarily deferred due to user complaints - 4.16.55.1' in the logs, 3 days later.

I opened a case with Yahoo, giving them my new vMTA IPs and explaining the situation, but they have yet to respond.

Has anyone dealt with this before? Any suggestions? Should I give it more time?


Thank you

[jmendoza]

A bit more background, we used the same config, just updated the vMTA name and IPs.

[ReyM]

Make sure you start off sending to only clickers, openers and other engaged segments. Yahoo is throttling you because they don’t like what your sending and their users are complaining.

[jmendoza]

Make sure you start off sending to only clickers, openers and other engaged segments. Yahoo is throttling you because they don’t like what your sending and their users are complaining.

Thanks ReyM. We're still sending to the same clients. Our clients are teachers, school staff, students, and parents and non of that has changed since migrating to the new server.

[CaLViN]

Well,
have you heard about ip reputation and warm-up? ))))

[jmendoza]

Well,
have you heard about ip reputation and warm-up? ))))

Hello CaLViN, I'm a bit new to this world so not entirely familiar with IP reputation. I do know that when I Google it, a top hit is www.senderscore.org where I've ran all 16 of my public IPs and so far they have all been above 90.

Yahoo expects you to wait 48 hours before requesting a follow up so I'm doing that today.

[ReyM]

There are very many things that go into your "email reputation" ... Senderscore is only 1 very small part of it (and not as widely used as it once was). The main free email providers (gmail, hotmail, aol, etc.) all use many, many metrics to figure you out... that includes:
IP address
IP neighbors
SMTP From
From Address
Reply-To Address
Other Email Headers
etc, etc, etc.

so when you move to a new geo and new IP addresses you need to start small and grow your send volume and establish a positive pattern. Many ISPs will only allow so many messages from a new / unseen IP address until they "prove themselves" as a good IP sender, etc.
 

[jmendoza]

What's the best way to "warm" up to Yahoo? Here's what I have changed my config to after emailing back and forth with Port25 Support:

<pattern-list defaultPatterns>
   rcpt-to /@yahoo.com/ virtual-mta=yahooMta
</pattern-list>

<domain $yahoo>
    max-smtp-out 20
    max-msg-per-connection 4
    smtp-greeting-timeout  5m   #  added in v3.2r17
    mx-connection-attempts 10   # added in v3.2r16
    dk-sign yes
    dkim-identity strict-from
    smtp-pattern-list yahooBackoff
    backoff-to-normal-after 4h  #added in v3.5
    backoff-max-msg-rate 400/h # Use with PowerMTA 3.5
    backoff-retry-after 60m
    backoff-notify emailadmin@somedomain.com
</domain

The pattern list I added today to limit the amount of vMTAs from 16 to 2.

Should I include a 'max-msg-rate'?