Avatar of Mattia Minervini
Mattia Minervini
Flag for Italy asked on

Creating a correct SPF record

Hi, i want to create an SPF record but:
- My hosting provider hasn't an SPF area, but only TXT area

- Surfing the web i can find a lot of info or best practices, but i don't know which follow ("don't use INCLUDEmechanism, if you use A mechanism you have to first create a dns A record, don't write more of 405 char, don't use ~ALL because it cause SOFT FAIL.....and so on)

- we send mail with two different SMTP Authenticad server, external to our network. Only in case of trouble, directly with our MX record

- trying to validate my txt spf record here:
http://www.kitterman.com/spf/validate.html
i receive Ok but with a warning a can't understand:
Results - record processed without error.
The result of the test (this should be the default result of your record) was, ambiguous . The explanation returned was, SPF Ambiguity Warning: No MX records found for mx mechanism: example.com


- this is record i created:
v=spf1 mx include:_smtpsvc.xxxxxxxxxx.com include:_spf.yyyyyyyyyyyy -all

Please help me creating a correct and validate record for my domain, and clear me benefits of making it.
Really thanks, sorry for my english, ask me for details

Mattia
DNSExchange

Avatar of undefined
Last Comment
Mattia Minervini

8/22/2022 - Mon
SOLUTION
Todd Nelson

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
See Pricing Options
Start Free Trial
GET A PERSONALIZED SOLUTION
Ask your own question & get feedback from real experts
Find out why thousands trust the EE community with their toughest problems.
ASKER CERTIFIED SOLUTION
Vince Glisson

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
See Pricing Options
Start Free Trial
GET A PERSONALIZED SOLUTION
Ask your own question & get feedback from real experts
Find out why thousands trust the EE community with their toughest problems.
Mdlinnett

@Todd,  I've seen the underscore used before.  When mail goes via a 3rd party (smart host, cloud security), there are so many servers and IPs that can change, they house a list which the record beginning with an underscore points to.

This means the provider updates the list once and in one place only if a change is made to their infrastructure.

Another useful tool is http://www.mail-tester.com
Mattia Minervini

ASKER
Positive contribute. record SPF is up and running
I started with Experts Exchange in 2004 and it's been a mainstay of my professional computing life since. It helped me launch a career as a programmer / Oracle data analyst
William Peck