The Rejected Folder

Our blog shares expert insights on email security, DMARC configuration, and deliverability optimization.

aspf=r, aspf=s, adkim: DMARC relaxed vs strict
dmarc-setup ·

aspf=r, aspf=s, adkim: DMARC relaxed vs strict

aspf=r is relaxed SPF alignment (subdomains align); aspf=s is strict (exact match). Both aspf and adkim default to r. Lookup table and pass/fail examples inside.

DT
DMARCTrust
7 min read
SPF failed: why it happens and how to fix it
dmarc-setup ·

SPF failed: why it happens and how to fix it

SPF failures show up in your DMARC reports or email headers, but the reason is not always obvious. We break down the common causes of SPF failures and walk through practical troubleshooting steps.

DT
DMARCTrust
11 min read
Email authentication monitoring: why set-and-forget fails
dmarc-monitoring ·

Email authentication monitoring: why set-and-forget fails

Publishing SPF, DKIM, and DMARC records is just the start. Without monitoring, you won't know when authentication breaks, new senders appear, or someone starts spoofing you.

DT
DMARCTrust
9 min read
DMARC compliance tools in 2026: what you actually need
vendor-comparison ·

DMARC compliance tools in 2026: what you actually need

DMARC compliance is mandatory, but most companies approach it wrong. Here's what tools you actually need, who needs what, and what happens when you skip proper monitoring.

DT
DMARCTrust
14 min read

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