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RyanMoravick
RyanMoravick
New Participant
August 15, 2023
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Using the same From Domain for multiple Marketo instances

  • August 15, 2023
  • 1 reply
  • 2738 views

Hello!

 

I am working on a project where a client has two instances of Marketo and one is brand new and I am working on the admin set up tasks. They would like to use the same From Domain across both instances, example.company.com. My understanding is that this is not advised as an alias value is only allowed to appear once per DNS zone. Is my understanding correct? Would the best course of action be to have them establish a different domain for the new instance? Thank you.

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Best answer by SanfordWhiteman

Using the same From: header domain is fine.

 

Has nothing to do with the alias (CNAME RR) limitation, as you don’t create any aliases for the From: domain. That’s only relevant to branding/tracking domains and LP domains.

 

You do need to get an alternate DKIM selector for one of the instances. That’s where there’s a possible DNS conflict. Marketo uses “m1” by default but the second instance can get “m2”. Open a support case on the “m2” instance to make that happen. 

1 reply

SanfordWhiteman
SanfordWhitemanAccepted solution
New Participant
August 15, 2023

Using the same From: header domain is fine.

 

Has nothing to do with the alias (CNAME RR) limitation, as you don’t create any aliases for the From: domain. That’s only relevant to branding/tracking domains and LP domains.

 

You do need to get an alternate DKIM selector for one of the instances. That’s where there’s a possible DNS conflict. Marketo uses “m1” by default but the second instance can get “m2”. Open a support case on the “m2” instance to make that happen. 

    RyanMoravick
    RyanMoravickAuthor
    New Participant
    August 15, 2023

    Thank you for clarifying Sanford!

     

    For the alternate DKIM selector, you are referring to the article here, correct? https://nation.marketo.com/t5/knowledgebase/dkim-conflict-when-two-marketo-instances-use-the-same-email/ta-p/254996

     

    In that case, I would open a support ticket to have them copy the verified DKIM key from the original instance and place it in the new instance so they both have the same DKIM key. Is that correct?

     

    Thanks again!

    SanfordWhiteman
    SanfordWhiteman
    New Participant
    August 15, 2023
    No, you should ask for a different selector, m2.

    You don't want the instances to be entangled by using the same selector (if you have to change one because of a compromise or any other reason, you don't want side effects).
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