https://denetta.com/en/blog/ Sourced, practical articles on domain and email security, FortiGate auditing and IT infrastructure audits. en Wed, 07 Oct 2026 00:00:00 GMT https://denetta.com/en/blog/how-to-write-spf-record/ https://denetta.com/en/blog/how-to-write-spf-record/ An SPF record is a TXT record listing the servers allowed to send mail for your domain. Correct syntax, ~all vs -all and the 10 DNS lookup limit. Wed, 07 Oct 2026 00:00:00 GMT Bilal Ünsal https://denetta.com/en/blog/microsoft-365-spf-dkim-dmarc-setup/ https://denetta.com/en/blog/microsoft-365-spf-dkim-dmarc-setup/ Setting up SPF, DKIM and DMARC for a Microsoft 365 domain: the records you need, the Defender portal path, and steps for Azure DNS, Cloudflare and Natro. Wed, 07 Oct 2026 00:00:00 GMT Bilal Ünsal https://denetta.com/en/blog/what-is-dkim/ https://denetta.com/en/blog/what-is-dkim/ DKIM is the cryptographic signature of the domain sending a message. What a selector is, how to check a DKIM record, key length and the t=y flag. Wed, 07 Oct 2026 00:00:00 GMT Bilal Ünsal https://denetta.com/en/blog/what-is-dmarc/ https://denetta.com/en/blog/what-is-dmarc/ DMARC is the DNS record that tells receivers what to do with mail failing SPF and DKIM. The three policies, rua reports and a safe path to p=reject. Wed, 07 Oct 2026 00:00:00 GMT Bilal Ünsal