There is a neat website to check your email settings that was on the HN front page earlier this year:
Please read my blog here: https://www.uriports.com/blog/introduction-to-spf-dkim-and-d...
It will explain how SPF, DKIM, and DMARC work together to prevent spam.
This is the original submission where the link came from if it helps:
Also, what policy do you recommend fro DMARC: none, quarantine, or reject?
If you're just starting out, start with none. Quarantine or reject needs to be carefully monitored over time.
Once you are confident that all the legitimate mail is aligned, then go straight to p=reject. Many will recommend quarantine, but it's better to have an email bounce back immediately vs silently get lost in a spam folder. Outside of troubleshooting there isn't much use for P=Quarantine in DMARC or '~all' in SPF.
Gmails changes are not deliberately affecting fastmail at all.
[1] https://fastmail.blog/historical/all-outbound-email-now-bein...
Not fastmail specific.
MX 0 .
For such domains.
Recommend mxtoolbox for validating configurations https://mxtoolbox.com/
Specifically send a test email to ping@tools.mxtoolbox.com and it will advise you of your current settings.
Dmarcian has good resources on DMARC specifically, and can act as an RUA report reader as a paid service. https://dmarcian.com/alignment/
This hit me a week ago. After a friend let me know, configuring DKIM/SPF did the trick in minutes.
Is that really bad?
I sent a mail from it to a gmail account, and it was not flagged as spam
Also, when I send a mail from my university address, it says, the DKIM user identifier does not match the from header
