HTTP Headers Analysis for https://mail.sendpulse.com

SSL Verification Bypassed

The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.

Reason:

Hostname Mismatch - certificate is issued for mail.yandex.ru, mail.yandex.by, mail.yandex.com, mail.yandex.com.tr, mail.yandex.kz, mail.yandex.fr, mail.yandex.az, mail.yandex.com.am, mail.yandex.com.ge, not for mail.sendpulse.com

Open Cached · just now

20 Headers

Detected Technologies from Headers

See all in URL Inspect 2

Yandex

Yandex Tools

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=315360000; includeSubDomains; preload

Content-Security-Policy

Basic

default-src; style-src; script-src; +13 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Present

origin

Permissions-Policy

Missing

Not configured

Recommendations

• Improve CSP by adding more specific directives and removing 'unsafe-inline'
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding, Sec-CH-Prefers-Color-Scheme

connection: Close
transfer-encoding: chunked
vary: Accept-Encoding, Sec-CH-Prefers-Color-Scheme

Caching Headers

Cache-Control

Caching

no-store, no-cache, must-revalidate, proxy-revalidate

Expires

Caching

Pragma

Caching

no-cache

cache-control: no-store, no-cache, must-revalidate, proxy-revalidate
expires: 0
pragma: no-cache

Content Headers

Content-Type

Content

text/html; charset=utf-8

content-type: text/html; charset=utf-8

Server Headers

No server headers found

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

set-cookie: uniqueuid=83630180df8444e5812829037a2956b01777905661; Max-Age=315360000; Path=/; Expires=Thu, 01 May 2036 14:41:01 GMT; HttpOnly; Secure; SameSite=Lax
lah=; Domain=.passport.yandex.ru; Expires=Thu, 01 Jan 1970 00:00:01 GMT; Secure; HttpOnly; Path=/
_yasc=cC7E8Hi5NO8lHSk08bpfxN3xdsvOcPeQBMkn28fREgOodSSXyL6KbayeZ1JwO491VA==; domain=.yandex.ru; path=/; expires=Thu, 01 May 2036 14:41:01 GMT; secure
i=4p6TJESvW6FGQCjguOmmFSWSYFoAcRG5i9wMdvql6ZQXB61zXl3mtSvUiB8Kj3Tja1CRzilWTd+YCq+qC6W/7QoZ2j0=; Expires=Wed, 03-May-2028 14:41:01 GMT; Domain=.yandex.ru; Path=/; Secure; HttpOnly
yandexuid=4415204881777905661; Expires=Wed, 03-May-2028 14:41:01 GMT; Domain=.yandex.ru; Path=/; Secure
yashr=5840427011777905661; Path=/; Domain=.yandex.ru; Expires=Tue, 04 May 2027 14:41:01 GMT; Secure; HttpOnly; Partitioned

Other Headers

Accept-Ch

Other

Sec-CH-Prefers-Color-Scheme

Date

Other

Mon, 04 May 2026 14:41:01 GMT

Surrogate-Control

Other

no-store

X-Dns-Prefetch-Control

Other

off

X-Download-Options

Other

noopen

X-Yandex-Passport-Authorize

Other

accept-ch: Sec-CH-Prefers-Color-Scheme
date: Mon, 04 May 2026 14:41:01 GMT
surrogate-control: no-store
x-dns-prefetch-control: off
x-download-options: noopen
x-yandex-passport-authorize: 1

Recommendations

Enable compression (gzip/brotli) to improve performance