GoKawiilGuide details SPF, DKIM and DMARC setup using Mailfully's domain tool
A new how-to guide walks through configuring SPF, DKIM and DMARC records for a sending domain, using Mailfully's setup process as the working example. It explains that SPF authorizes sending IPs, DKIM cryptographically signs messages, and DMARC checks alignment between the two and enforces a policy, with receiving servers using all three to decide whether mail is legitimate.
GoKawiil's interpretation of the reporting above, not reported fact.
The guide notes that Gmail already requires SPF or DKIM for any sender and all three for senders exceeding roughly 5,000 daily messages to personal accounts, meaning even small automated senders like password-reset or invoice emails could be affected by missing records. This suggests that as inbox providers tighten authentication requirements, misconfigured records could increasingly cause legitimate transactional email to bounce or land in spam rather than just marketing mail.
- SPF, DKIM, and DMARC work together to verify a sending domain's authenticity to receiving mail servers.
- Gmail mandates SPF or DKIM for all senders and all three for high-volume senders to personal accounts.
- The guide recommends configuring these records immediately upon connecting a sending domain, regardless of provider.
Source: mailfully.com, 2026-10-01
Published there as: “How to set up SPF, DKIM, and DMARC for your sending domain”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.