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Deliverability question / gmail interpretation of from email

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Re: Deliverability question / gmail interpretation of from email

Okay. So if I understand your reply correctly, seeing potomac1050.mktomail.com listed as a spammer could be due to something we did or it could be the result of other emails coming from a shared IP - there's no way to know for sure. Is that right?

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Level 10 - Community Moderator

Re: Deliverability question / gmail interpretation of from email

Yes, but it's not listed as a spammer in this instance.

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Re: Deliverability question / gmail interpretation of from email

Now you've lost me. I saw it listed in some email suspend causes.

On Tue, Jun 4, 2019 at 9:53 AM Sanford Whiteman <marketingnation@marketo.com>

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Level 10 - Community Moderator

Re: Deliverability question / gmail interpretation of from email

Now you've lost me. I saw it listed in some email suspend causes

Saw what?

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Re: Deliverability question / gmail interpretation of from email

You said "it's not listed as a spammer" but I saw that email address listed as a spammer.

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Level 10 - Community Moderator

Re: Deliverability question / gmail interpretation of from email

Oh, it can be listed, sure. But what you're posting here about Gmail is orthogonal to that.

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Re: Deliverability question / gmail interpretation of from email

Dedicated IP is possible, we use it as my firm requires it...but I agree it is not common and most use Marketo's shared IPs.

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Level 10 - Community Moderator

Re: Deliverability question / gmail interpretation of from email

Yes, it has to be this way because no service can allocate a public IP to every individual tenant. There simply aren't enough IPv4 IPs to go around in the world, let alone in a single company's hands.

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Level 3 - Champion Alumni

Re: Deliverability question / gmail interpretation of from email

Hi Denise,

I agree with Sandy's response but just in case, if you haven't yet, check whether SPF has been configured correctly - I've seen this issue when authentication has not been set up.

Inga

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Level 10 - Community Moderator

Re: Deliverability question / gmail interpretation of from email

But SPF isn't correct when it includes machines that actually shouldn't be allowed to send mail using your domain as the envelope sender. 

Blindly including mktomail.com in SPF for shared instances is a security risk (however mild) b/c it needlessly allows people to impersonate your domain. But the far bigger risk is you break your SPF entirely by going over DNS lookup limits. In fact Denise's client's domain has used all 10 of their allowed DNS lookups because they included Marketo unnecessarily!  If they tried to include one more domain, the whole thing will break -- they will not in effect not have an SPF record.