On Sunday, February 23, 2020 2:53:28 PM EST Mohamed Lrhazi wrote: > Hello all, > > Sorry for a non-postfix specific question. > > I am running into an issue with a big SPF record I had been maintaining. I > went ahead a broke it up using the include: mechanism, but am still trying > to figure out the limit I did hit. > > For testing purposes, I send emails from this addr...@spf.255.cuaemail.org > to gmail, yahoo.com, and outlook.com > > The SPF record for that domain is made up of 255 ip4 addresses, the last of > which is my true client IP. Please check it out with dig. > > gmail and yahoo fail the SPF test. outlook passes. > > Using addr...@spf.101.cuaemail.org, gmail also passes. The SPF for this > domain has 101 addresses. > > Using addr...@spf.63.cuaemail.org, yahoo also passes. > > So am concluding these vendors have these limits for the number of IPs in a > single SPF record... would that be correct conclusion? anyone knows if this > is documented by these vendors? > > I opened a case with Google and so far they have been insisting there is no > such limit!
There is no hard limit. See RFC 7208 Section 3.4. Scott K
