apdu.fr

Registration · The registration expires on 2026-11-08. Make sure it is renewed.

SOA · The serial 2091052542 looks like a date (YYYYMMDDnn) in the future (2091-05-25). It can only grow, so a wrong date can't be undone without a serial wrap-around.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

DKIM · The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.

DMARC · DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...

MX · These MX addresses have no PTR record, which many receivers treat as a spam signal: 2a01:e0a:1183:6d00:1814:78ff:fe6a:9cf7 (zotac.apdu.fr). Ask your hosting provider to set one.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.