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SPF record for multiple domains on one mail server .. RRS feed

  • Question

  • Hello :)

    I have a domain, bla.xx, blo.xx, bli.xx and blu.xx ..  All domains have  A record mail.xx.xx. 
    One domain has PTR record "mail.ble.xx". How will look SPF record for another domain ..? 

    For domain ble.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.ble.xx -all" It is fine.

    For domain bla.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.bla.xx -all"
    or "v = mx spf1 the IP4: 111.222.333.444 include: spf.bla.xx include: mail.ble.xx -all" 
    For domain blo.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.blo.xx -all"
    or "v = mx spf1 the IP4: 111.222.333.444 include: spf.blo.xx include: mail.ble.xx -all"  
    For domain bli.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.bli.xx -all"
    or "v = mx spf1 the IP4: 111.222.333.444 include: spf.bli.xx include: mail.ble.xx -all"  
    For domain blu.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.blu.xx -all"
    or "v = mx spf1 the IP4: 111.222.333.444 include: spf.blu.xx include: mail.ble.xx -all"  

    Exchange server has one public IP.

    Thank you Michal. I'm sorry for my English.

    Wednesday, July 27, 2016 3:18 PM

Answers

  • Why do you have so many A records?  You don't have to have an A record for every domain.  Each domain's MX record can point to the same A record.  That one A record can be in every domain's SPF record.

    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Celebrating 20 years of providing Exchange peer support!

    Wednesday, July 27, 2016 10:47 PM
    Moderator

All replies

  • Why do you have so many A records?  You don't have to have an A record for every domain.  Each domain's MX record can point to the same A record.  That one A record can be in every domain's SPF record.

    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Celebrating 20 years of providing Exchange peer support!

    Wednesday, July 27, 2016 10:47 PM
    Moderator
  • Hi Michal,

    Is there any update for this thread?

    If the above suggestions are helpful to you, please mark it as answer so that someone who has similar issue could find this thread as soon as possible.

    Best Regard,

    Jim Xu


    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Jim Xu
    TechNet Community Support

    Friday, July 29, 2016 10:06 AM
    Moderator