I can't send email

This step-by-step guide will help you solve issues with sending email. Before you start, open Yandex.Mail in a new tab to follow the recommendations.

Select a problem:

Enter your valid personal details in Yandex.Passport and link your phone number to your account. It may be that our security system considers your account suspicious and blocked the mailbox. This usually happens if you don't link a phone number to your mailbox or enter a fake name in Yandex.Passport. It usually takes a couple of hours to have your account unblocked.

Check if the email is in your Sent folder. If the email is not there, an error might have occurred while sending the email – try sending it again.

If you have sent a message from your Yandex mailbox but it has been rejected by the recipient's mail server, you will get an automatic report from “Mailer-Daemon” with reasons for non-delivery and the name of the server which rejected passing the message to its destination.

Have you received a non-delivery report?

Specify the address you sent the email to:

The reason for why the email was not received will be indicated in the automatic report. How to find and interpret the error:

  1. Find the phrase Diagnostic Code. You will see the error code to the right of it.
  2. Find this code in the table below.
    Tip. For quick search in the table, use Ctrl+F for Windows and Cmd+F for macOS.
Error code Reason and solution

Bad recipient address syntax

Bad address mailbox syntax

No correct recipients

No such user

Recipient address rejected: need fully-qualified address

The email was sent to a non-existing address.

Make sure the recipient's address does not include extra punctuation marks, spaces, or quotation marks. Confirm the recipient's email address and resend the message.

Message rejected under suspicion of SPAM

Client host [IP_host] blocked using spamsource.mail.yandex.net; see...

Blocked by spam statistics — see...

The email seems to be spam.

If only spam is coming from your mailbox, the Yandex mail server will block receipt of messages from it for 24 hours.

Note. If you are sending legitimate messages to your website users or subscribers, please read Yandex requirements for honest mailing lists.

Policy rejection on the target address

The recipient's account has been blocked due to User Agreement violations.

Try contacting the recipient by another method and report the problem.

If you are the owner of the address to which the message has been sent, you can unblock it yourself. Fill in accurate information about yourself on the Personal information page and you will be unblocked after a while. If you have provided accurate information but weren't unblocked, please contact our support team via the feedback form at the bottom of the page.

Mailbox size exceeded

Mailbox size limit exceeded

Message infected by virus

The recipient's mailbox is full. This usually happens because the recipient does not use their mailbox often and their mailbox is full.

Try contacting the recipient by another method and report the problem. The recipient will have to log into Yandex.Mail via the web interface to be able to receive emails again.

Error: message file too big

Message size exceeds fixed limit

The attached file is too big. The Yandex email server cannot accept your attached file due to size restrictions. The maximum size of messages with attachments that can be sent to Yandex mailboxes is 30 MB.

Upload your attachment to a file storage service (such as Yandex.Disk) and include a link to it in your message.

Error: timeout exceeded

The recipient's email server is not responding. The recipient's email server took too long to respond and the Yandex email server disconnected and aborted the email delivery.

Try contacting the recipient by another method and report the problem.

Error: too many connections

The Yandex mail server is overloaded because of numerous requests from other servers. This increases the load on the server and slows it down.

Try contacting the recipient by another method and report the problem.

Error: too many recipients

This message has too many recipients, i.e. more than 35 addresses in the To, Cc, and Bcc fields.

Edit the list of recipients and try again.

The reason for why the email was not received will be indicated in the automatic report. How to find and interpret the error:

  1. Find the phrase Diagnostic Code. You will see the error code to the right of it.
  2. Find this code in the table below.
    Tip. For quick search in the table, use Ctrl+F for Windows and Cmd+F for macOS.
Error code Reason and solution

Bad destination mailbox address

Bad destination system address

Bad destination mailbox address syntax

DNS: no such domain

Invalid arguments - possible version mismatch

Invalid mailbox

Invalid recipient

Host or domain name not found

Mailbox unavailable

No such user here

The email account that you tried to reach does not exist

Unrouteable address

User not found

User unknown

The email was sent to a non-existing address.

Make sure the recipient's address does not include extra punctuation marks, spaces, or quotation marks. Confirm the recipient's email address and resend the message.

Message rejected as spam by Content Filtering

Message rejected under suspicion of SPAM

Message rejected. See http://mail.google.com/support/bin/answer.py?answer=69585 for more information

Sorry, message looks like SPAM to me

550 5.7.1 SPF check failed: IP_host is not authorized to send in the name of domain_name. (in reply to RCPT TO command)

The recipient's email server considers these messages spam.

Try contacting the recipient or his/her mail service administration by another method and report the problem.

If you are sending legitimate messages to your website users or subscribers, please read Yandex requirements for honest mailing lists.

Note. If you use Yandex.Mail for Domains, the SPF record must be set up on the linked domain.

Аccount is full

Error writing message: Disk quota exceeded

Inbox full

Over quota

Quota exceeded

Recipient's mailbox is full

User has exhausted allowed storage space

The recipient's mailbox is full. This usually happens because the recipient does not use their mailbox often and their mailbox is full.

Try contacting the recipient by another method and report the problem.

Policy rejection on the target address

Recipient rejected

This account has been disabled or discontinued

User account disabled for being inactive

Your emails has been returned because the intented recipient's email account has been suspended.

The recipient's address is blocked by their email service.

Try contacting the recipient by another method and report the problem.

Message file too big

Message size exceeds fixed limit

Message size exceeds fixed maximum message size

The recipient's email server can't handle large messages. The recipient's email service can't accept your email due to restrictions regarding your attached files.

Upload your attachment to a file storage service (such as Yandex.Disk) and include a link to it in your message.

Client host [IP_host] blocked using bl.spamcannibal.org; blocked, See: http://www.spamcannibal.org/cannibal.cgi?page=lookup&lookup=IP_host

Client host [IP_host] blocked using dnsbl-1.uceprotect.net; IP IP_host is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=IP_host

Email blocked by SPAMCANNIBAL — to unblock see...

Email from IP_host is currently blocked by Verizon Online's anti-spam system

Recipient address rejected: Blocked by external RBL

Your host [IP_host] is blacklisted by dnsbl.sorbs.net. Currently Sending Spam See: http://www.sorbs.net/lookup.shtml?IP_host

Your server IP address is in the bl.spamcannibal.org database

The Yandex mail server was blacklisted. You can try deleting the Yandex mail server address from the blacklist manually by clicking on the link in the report. You can also contact us by forwarding the full text of the error report using the form below.

Also, try contacting the recipient or his/her mail service administration by another method and report the problem.

Loop detected! Message rejected

Mail for email loops back to myself

Our servers have detected a mail loop

A loop was detected in sent messages. Check forwarding filters and importers for all of your mailboxes. They may be configured incorrectly. If you are sure the problem is not on your end, contact the recipient by an alternate means of communication to report the problem.

Relay not permitted

Sorry, relaying denied from your location

Forwarding prohibited (the recipient's mail server can't identify Yandex.Mail servers because the MX records are not configured properly).

Try contacting the recipient or his/her mail service administration by another method and report the problem.

Note. If you use Yandex.Mail for Domain and send an email to your domain's mailbox, note that it may take up to 48 hours for the MX record to propagate. If 48 hours already passed, make sure that the settings match the recommendations given in the article on setting up the MX records.

Sender verification failed

Error verifying the sender. To resolve the problem, contact the administration of the recipient's mail service and ask them to enter Yandex.Mail email addresses into the whitelist of the sender verification service.

Note. If you use Yandex.Mail for Domains, the SPF record must be set up on the linked domain.

If you didn't receive a non-delivery report, it means that your email was successfully delivered to the recipient's mail service. Contact Support for that email service to figure out why the message was not delivered. Attach to your request the properties of the email that you sent.


There may have been a network connectivity failure. Try searching for the message in Sent, Drafts, and Outbox.

This means the email has been sent successfully.

Most likely, an error occurred when sending the email. Try sending the email again.

Perhaps your email has attachments in it. Such messages take longer to be delivered. Please wait a couple of minutes. If the email is still not sent out, try sending it again manually.

Most likely, an error occurred when sending the email. Unfortunately, it's impossible to restore such an email.

Tip. If you frequently write long messages, make sure to save them as drafts. This will help save your email in case of an error.

If you receive the error message "Message cannot be sent because it looks like spam" (“Spam limit exceeded” or “Message rejected under suspicion of SPAM”) or a prompt to enter a captcha code, this may be caused by the following:

Messages that are similar or use a template are sent out

Messages that are similar, use a template, or contain commercial or advertizing proposals are sent from your mailbox. Yandex.Mail doesn't allow you to send these types of email. Our service is intended for actual communication between people.

Tip. If you want to send out mass emails to your partners or clients, please use our special mailing services.
The daily limit on how many emails you can send was reached

Your mailbox sends out a large number of messages every day, which is regarded as spam by our security system. The emails can be sent both with your involvement and without your knowing about it.

In order to avoid this, Yandex.Mail has set restrictions on the number of emails you can send each day. Said restrictions cannot be changed or avoided.

You can send up to 500 emails from one mailbox in a 24-hour period. If the email has several recipients, then each individual email sent counts separately towards your total.

Additional limitations are set on the number of recipients:

Number of recipients Restriction
Total for all email in a 24-hour period 500
In one email sent from the site 50
In one email sent from a mail client or over SMTP 35
Attention. Limits can be lowered if Anti-Spam notices the mass emailing of similar messages, templates, spam, advertising, or commercial offers.
Your account was marked as suspicious

Our security system flagged your account as suspicious. Usually this happens if you didn't link a phone number to your mailbox or a fake name was entered in your Yandex.Passport.

messages are sent to non-existent addresses.

A large number of messages were sent to nonexistent addresses from your mailbox. If email is sent to an address that doesn't exist, you receive an automatic non-delivery report .

We received a complaint about a mailing sent from your email address

We received several complaints from users about spam sent from your email address.

If this occurred, sending email from your mailbox will be blocked. Only sending emails is blocked. You will be able to log in to Mail and receive emails. If you don't try to send email during this time, the block is automatically lifted after 24 hours — otherwise the block is extended for another 24 hours.

While you are waiting for the block to be removed, follow the recommendations below to avoid similar issues in the future:

  1. Check your computer for viruses using free antivirus programs, like CureIt! by Dr.Web or Kaspersky Virus Removal Tool. Then change your password.
  2. Enter your valid personal information in Yandex.Passport and link your phone number to your account.
    Note. If you use Yandex.Mail for a domain, enter the exact data for all the domain mailboxes.
  3. Make sure the your recipients addresses are entered correctly and remain active.
  4. Make sure that recipients of your emails have voluntarily agreed to receive them.

If you receive “Message rejected under suspicion of SPAM”, it means that Yandex.Mail determined that the contents of your email is spam. To resolve the problem, open the Yandex.Mail web interface and send a test email. This shows the system that messages are not being sent by a robot.

Check your computer for viruses using free antivirus programs, like CureIt! by Dr.Web or Kaspersky Virus Removal Tool.

For more information, see the I got a message "Email can't be sent" section.

If you receive a message that says Error occurred. Please try again in a few minutes, this means you are trying to use Yandex.Mail to send messages from an address hosted on another email service. Check that you have a fetcher configured from that mailbox to your Yandex mailbox. You cannot select an address on another mail service as an alias without a configured fetcher.

If you cannot send messages from an address hosted on another mail service even though the importer is configured correctly, that service's security rules prohibit sending messages through third-party services, including Yandex.Mail.

To continue sending messages via Yandex.Mail, select your Yandex address in the From field (login@yandex.com).


If your emails are sent from an address on @yandex.com or @ya.ru instead of @yandex.ru, it means that the wrong mail alias is selected in your settings.

You can choose an address to use in the Sender information section. This alias will be used by default for all messages.

You can choose an alias on the page for composing a message. The alias you pick will only be used for this particular email.

Delays can occur both on Yandex's servers and on the servers of your recipients. To determine the server responsible for the delay, contact our support team using the form below. When filling out the form, include the properties of the delayed email from the recipient's mailbox.

If you don't see your issue on the list, please contact our support team using the form below.