Discussion on "550 5.7.1 Message rejected: Message lacks SPF/DKIM/DMARC Auth Records (Outlook.com fix)"

Swift Labs · 2026-11-10T13:03:52.820Z

Outlook.com and Hotmail are bouncing mail from domains with no DMARC record. What the 550 5.7.1 error means and the one TXT record to add.

Discussion on "550 5.7.1 Message rejected: Message lacks SPF/DKIM/DMARC Auth Records (Outlook.com fix)" | Hashnode

550 5.7.1 Message rejected: Message lacks SPF/DKIM/DMARC Auth Records (Outlook.com fix)