Checking DNS records

If you want to avoid problems sending and receiving mail, make sure your DNS records are set up correctly. You can do that using this service: http://www.digwebinterface.com. You can also try other dig utilities:

MX record
  1. Specify the name of your domain in the Hostnames or IP addresses field (such as example.org).

  2. Find the Type field, select MX, and click Dig.

  3. The response should look like this:

    example.org.  20755 IN MX 10 mx.yandex.net.
SPF record
  1. Specify the name of your domain in the Hostnames or IP addresses field (such as example.org).

  2. Find the Type field, select TXT, and click Dig.

  3. The response should look like this:

    example.org. 21600 IN TXT "v=spf1 redirect=_spf.yandex.net"

    or

    example.org. 21600 IN TXT "v=spf1 ip4:IP-1 ip4:IP-2 ip4:IP-3 include:_spf.yandex.net ~all"
DKIM signature
  1. Find the field that says Hostnames or IP addresses and choose the subdomain formatted like mail._domainkey.example.org (replace example.org with your domain name).

  2. Find the Type field, select TXT, and click Dig.

  3. The response should look like this:

    mail._domainkey.example.org. 21599 IN TXT "v=DKIM1\; k=rsa\; t=s\; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDlk+IUXTHUIumVpG1S0vwFuwO9AC2aRrJj21MLj7xvO0Brys/fDxOTaFsoVsA2/t9mcxf1kqx/bCsEvJiiOUUw5eihQefcY7xJoeruJK/o+IKU2dTO9OOPfSyqGLuQ+v/DMJRjhz73XOpkPOpPwLhQKhvBLNM2TCxPqCL0E42/7wIDAQAB"
CNAME record
  1. Find the field that says Hostnames or IP addresses and choose the subdomain formatted like mail.example.org (replace example.org with your domain name).

  2. Find the Type field, select TXT, and click Dig.

  3. The response should look like this:

    mail.example.org. 21599 IN CNAME domain.mail.yandex.net.

If the server doesn't respond, the response doesn't match the request or it contains too many records, the DNS records have been set up incorrectly. Configure them according to the following instructions: MX record, SPF record, DKIM signature, CNAME record.

Attention. Wait 72 hours before checking DNS records again. It may take DNS servers that long to update their record data.