Troubleshooting
Why multiple SPF TXT strings break validation and how to merge includes into a single record.
Only one SPF TXT record should exist at each fully qualified name that sends mail (often the root domain or a subdomain label).
Combine every authorized include, ip4, and other mechanisms into a single v=spf1 ... string that stays under DNS TXT size limits.
Query live DNS from multiple resolvers after edits—stale caches can hide duplicate TXT strings briefly.
Why DNS changes lag, how TTL affects rollout, and how to verify TXT records globally.
DMARC can pass while folders still filter mail—check reputation, content signals, and mailbox-specific filters.
TXT and CNAME entries for SPF, DKIM, and DMARC when Cloudflare proxies email-related names correctly.
Common causes of SMTP auth failures for application mail—credentials, ports, TLS, and provider policies.
Cookie choices
We use a required session cookie for login and optional analytics cookies for marketing pages. Read cookie policy