Hello, On spamassassin-4.0.1 when the e-mail field "From:" contains space DMARC check doesn't work and the spam/phishing emails are not blocked via DMARC_REJECT rule. Here's an example: The following doesn't trigger the DMARC (note the space between no reply) From: companyname This works as expected and match DMARC_REJECT From: companyname Some of the spam/phishing e-mails start to use this technique to avoid the DMARC. Best Regards, V.Nikolaev