Probing TLS endpoints...

SMTP TLS Posture Check for tepleko.ru — Relaymetry

STARTTLS extends SMTP with opportunistic encryption. A mail server advertises STARTTLS during the EHLO handshake, and sending systems can negotiate TLS for the message body. Modern operators expect TLS 1.2 minimum; TLS 1.0 / 1.1 are deprecated.

SMTP TLS Posture Check for tepleko.ru

TLS configured with non-fatal issues.

Computed 58 seconds ago

Outbound submission TLS posture

TLS configuration looks healthy.

via heuristic `smtp.tepleko.ru`

Submission (port 587 / STARTTLS)

TLS configuration looks healthy.

TLS version: TLSv1.3
Cipher: TLS_AES_256_GCM_SHA384

Certificate

Subject: CN=*.hosting.reg.ru
SAN: *.hosting.reg.ru, hosting.reg.ru
Issuer: CN=GlobalSign GCC R6 AlphaSSL CA 2025,O=GlobalSign nv-sa,C=BE
Valid from: 2026-02-02T12:07:59.000Z
Valid to: 2027-03-06T12:07:58.000Z
Expires in: 286 days
Fingerprint: 00:F0:F2:62:CC:5F:EE:43…

SAN does not include MX host

SMTPS (port 465 / Implicit TLS)

TLS configuration looks healthy.

TLS version: TLSv1.3
Cipher: TLS_AES_256_GCM_SHA384

Certificate

Subject: CN=*.hosting.reg.ru
SAN: *.hosting.reg.ru, hosting.reg.ru
Issuer: CN=GlobalSign GCC R6 AlphaSSL CA 2025,O=GlobalSign nv-sa,C=BE
Valid from: 2026-02-02T12:07:59.000Z
Valid to: 2027-03-06T12:07:58.000Z
Expires in: 286 days
Fingerprint: 00:F0:F2:62:CC:5F:EE:43…

SAN does not include MX host

Inbound MX TLS posture (announced)

TLS configured with non-fatal issues.

MTA-STS policy

MTA-STS not published

TLS-RPT (reporting)

TLS-RPT not published

The result above probes the domains primary MX hosts on ports 25 + 587 (or whichever the domain uses) and reports the TLS version negotiated, certificate validity, SAN match status, and whether MTA-STS / TLS-RPT policies are published.

Configure TLS 1.2 minimum; aim for TLS 1.3 where possible. Ensure the certificate SAN includes the MX hostname (not just the apex domain). Publish MTA-STS to enforce TLS for inbound traffic and TLS-RPT to receive failure reports — both are zero-cost upgrades that meaningfully harden mail-in-transit security.