tester for spf and dkim validation
RealSender offers a free online check tool
to validate your SPF and DKIM settings sending an email message:
- send an email to spf@tester.realsender.com
- check online the SPF validation results at tester.realsender.com/spf
(it will take a minute to appear)
During verification, a prefix is added to the subject
if the message is not authenticated correctly.
Details on how it works are located in the
“email authentication basics” area of the website: