You might want to set up a DMARC policy for your domain. Since I set mine to "p=reject" I haven't had any such issues. DMARC extends DKIM and SPF, and you (typi

You might want to set up a DMARC policy for your domain. Since I set mine to "p=reject" I haven't had any such issues. DMARC extends DKIM and SPF, and you (typically) need to pass at least one of those to pass DMARC.