Page Comparison

...

• Check your SPF record. Several Web sites exist:
  • https://mxtoolbox.com/spf.aspx
  • https://www.dmarcanalyzer.com/fr/spf-4/checker/
  • https://www.kitterman.com/spf/validate.html
  • http://spf.myisp.ch/

Setup DKIM

Introduction to DKIM

...

DMARC - Procedure to follow

...

Due to recent changes to email handling by Google and Yahoo for anyone sending more than 5,000 emails daily, you should ensure that you have a DMARC record in

...

your DNS settings.

If you don't know anything about DMARC, then we recommend you add the following DNS record:

• _dmarc.mosamuseum.com.  IN TXT "v=DMARC1; p=none"

Please check afterwards with https://mxtoolbox.com/dmarc.aspx: it shouldn't include any errors (i.e. anything flagged with Image Modified). Please also read https://support.google.com/a/answer/10032473 to progressively improve your DMARC record.