Errors uploading and displaying Yandex Mail

Sometimes Yandex Mail buttons stop working, documents don't attach, or the browser reports an error.

Select a problem:

Why the email counter isn't working and how to fix it:

The browser doesn't display the page correctly

To reduce traffic consumption, the browser saves copies of visited pages in the cache. When you view these pages again, the browser may load them from the memory. For example, if the browser loads the incoming mail page from the cache, it shows an outdated number of new messages.

Try refreshing to force a fresh download of the page. If the problem persists, clear the browser cache and delete all cookies.

Extensions block Yandex Mail

Mail may work incorrectly due to the browser add-ons and extensions. To check if this is the reason, temporarily disable them. If Yandex Mail works incorrectly because of an ad blocking or antivirus extension, add Yandex Mail as an exception to the extension.

Why page elements don't display and how to fix the problem:

The browser doesn't display the page correctly

To reduce traffic consumption, the browser saves copies of visited pages in the cache. When you view these pages again, the browser may load them from the memory. For example, if the browser loads the incoming mail page from the cache, it shows an outdated number of new messages.

Try refreshing to force a fresh download of the page. If the problem persists, clear the browser cache and delete all cookies.

Extensions block Yandex Mail

Mail may work incorrectly due to the browser add-ons and extensions. To check if this is the reason, temporarily disable them. If Yandex Mail works incorrectly because of an ad blocking or antivirus extension, add Yandex Mail as an exception to the extension.

You are using an outdated browser

An outdated browser may not support the technologies used for fast and convenient page loading. Install the latest version of your browser.

Internet speed decreased

Close all browser tabs except Yandex Mail. Turn off applications that use the internet and refresh the page.

Why the desktop version of Yandex Mail is unavailable and how to fix the issue:
You're using an outdated browser

An outdated browser may not support the technologies used for fast and convenient page loading. Install the latest version of your browser.

The wrong compatibility mode is selected in Internet Explorer 8 and higher.

Compatibility mode in Internet Explorer 8 and higher may cause errors.

Set the Browser mode and Document mode to match your browser version.

  1. Press the F12 button or choose Developer tools in the menu.
  2. Click the icon and choose your browser version.

Note

If you use Internet Explorer of 11 and higher, choose Edge.

Extensions block Yandex Mail

Mail may work incorrectly due to the browser add-ons and extensions. To check if this is the reason, temporarily disable them. If Yandex Mail works incorrectly because of an ad blocking or antivirus extension, add Yandex Mail as an exception to the extension.

Hieroglyphs or unintelligible characters appear when the page encoding is incorrect. Encoding might be changed by viruses and malware.

Please check your computer for viruses with free anti-virus programs such as CureIt! from Dr. Web or Virus Removal Tool from “Kaspersky Lab”.

Why an email is displayed incorrectly and how to fix it:
Extensions block Yandex Mail

Mail may work incorrectly due to the browser add-ons and extensions. To check if this is the reason, temporarily disable them. If Yandex Mail works incorrectly because of an ad blocking or antivirus extension, add Yandex Mail as an exception to the extension.

Internet speed decreased

Close all browser tabs except Yandex Mail. Turn off applications that use the internet and refresh the page.

There is a problem with network connection

To check this, open Yandex Mail using mobile internet. If no errors occur, contact your provider's support team. If you use work email, tell your system administrator about the problem.

If the page doesn't load or loads slowly, you get the messages:

  • “An error occurred”.

  • “Try refreshing the browser tab or try again in a few minutes.”

  • “Please wait...”.

  • “Loading a page takes a long time”.

  • “Try refreshing the page or using the light version of Mail”.

Why the page doesn't load and how to fix it:

Extensions block Yandex Mail

Mail may work incorrectly due to the browser add-ons and extensions. To check if this is the reason, temporarily disable them. If Yandex Mail works incorrectly because of an ad blocking or antivirus extension, add Yandex Mail as an exception to the extension.

You are using an outdated browser

An outdated browser may not support the technologies used for fast and convenient page loading. Install the latest version of your browser.
I follow the instructions, but the problem persists

If the recommendations above don't help, you may have problems for the following reasons:

Internet speed decreased

Close all browser tabs except Yandex Mail. Turn off applications that use the internet and refresh the page.

There is a problem with network connection

To check this, open Yandex Mail using mobile internet. If no errors occur, contact your provider's support team. If you use work email, tell your system administrator about the problem.

The wrong compatibility mode is selected in Internet Explorer 8 and higher.

Compatibility mode in Internet Explorer 8 and higher may cause errors.

Set the Browser mode and Document mode to match your browser version.

  1. Press the F12 button or choose Developer tools in the menu.
  2. Click the icon and choose your browser version.

Note

If you use Internet Explorer of 11 and higher, choose Edge.

The security certificate error message starts with a phrase:

  • “Your connection is not private”.
  • “This site threatens your computer security.”
  • “Incorrect certificate”.
  • “Error in security certificate”.
  • “This is an untrusted connection”.

Why you get security certificate errors and how to fix them:

Untrusted connection or invalid security certificate errors may occur due to a conflict between the browser and computer settings. These errors may also be caused by your antivirus software. To find out why you are receiving the certificate error, look for its code at the end of the message.

Error code

Solution

ssl_error_bad_cert_domain

Make sure that you've entered the correct address in the browser's address bar: mail.yandex.com or passport.yandex.com, with com followed by / instead of a dot or another character.

err_cert_date_invalid

sec_error_oscp_invalid_signing_cert

sec_error_expired_issuer_certificate

sec_error_expired_certificate

sec_error_ocsp_future_response

Make sure that your date and time are correctly set on your computer. If the wrong date or time is set, the system may incorrectly determine that the certificate period didn't start yet or that it is already expired.

err_cert_common_name_invalid

err_cert_authority_invalid

sec_error_unknown_issuer

Make sure that your antivirus settings are not configured to check HTTPS connections. More information about how this can be done in Kaspersky Internet Security and ESET NOD32 Smart Security can be found under the table.
If you don't have an antivirus program on your computer, hackers may replace your security certificate using malware or an MITM attack. Please check your computer for viruses with free anti-virus programs such as CureIt! from Dr. Web or Virus Removal Tool from “Kaspersky Lab”.
Disabling HTTPS connection checks in Kaspersky Internet Security

  1. Open the antivirus window and click the button in the bottom left corner.

  2. Go to the Advanced settings tab and choose Network.

  3. In the Check secure connections block, choose Do not check secure connections and confirm the action.

Disabling verifications of HTTPS connections in ESET NOD32 Smart Security

  1. Open the antivirus window, go to the Settings tab and click the Additional link.

  2. Go to Web and email → SSL/TLS and turn off Enable SSL/TLS protocol filtering.

  3. Go to Web and email → Web access protection → Web protocols → HTTPS scanner setup and turn off Enable HTTPS checking.

  4. Tap OK to save your changes.

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