Forum Discussion

Jeff Harlow's avatar
Jeff Harlow
Iron Contributor
Apr 09, 2019

Record contains too many lookups (SPF Records)

I am curious how others are handling SPF records with multiple active vendors. We have several vendors that send emails on our behalf, so I add them to our SPF record. However we always have more tha...
exchange online
VasilMichev's avatar
VasilMichev
MVP
Apr 09, 2019

The best workaround is to use a separate domain/subdomain for such emails. 

  • Jeff Harlow's avatar
    Jeff Harlow
    Iron Contributor
    Apr 09, 2019

    VasilMichev Can you elaborate on this one, please? 

    • VasilMichev's avatar
      VasilMichev
      MVP
      Apr 10, 2019

      Jeff Harlow Simply create a separate record for another domain and use it to send those messages.

       

      DougBartley multiple SPF records for the same domain are NOT supported.

      • DougBartley's avatar
        DougBartley
        Copper Contributor
        Apr 10, 2019

        VasilMichev We have a single SPF record setup in DNS and then 2 TXT records that are referenced in the SPF record.  All records are read as one by recipient servers and we have a valid SPF record with 10/10 lookups.  It has worked for what we are doing and we have not had issues with any vendors switching or adding IP's.  Most have a large block of IP's and adding the entire block has worked fine.    Also, most of these emails being sent are for our marketing department so they are not critical emails.  

         

        sampledomain.com TXT
        v=spf1 include:spf1.sampledomain.com include:spf2.sampledomain.com include:spf3.sampledomain.com -all

         

        spf1.sampledomain.com TXT
        v=spf1 a mx a:mail.domain.com a:mail.domain.ie a:server5.somedomain.com

         

        spf2.sampledomain.com TXT
        v=spf1 server7.somedomain.com mx:server95.somedomain.com include:thatdomain.com

         

Resources