System Verification Codes Not Received for Salesforce

IMPORTANT: In Salesforce products, email, SMS text messages, and phone calls aren’t allowed as compliant MFA verification methods because email credentials are more easily compromised, and text messages and phone calls can be intercepted.

SMS (Text Message) Verification

1. Fully reboot or restart the mobile device to refresh the device’s Carrier connection.
2. If you receive the following error, wait an hour after the first of the 5 attempts, and request another code. Note: Salesforce has a limit of 5 SMS verification codes per hour.

Email Verification codes 

1. Check all Spam, Junk, or Clutter folders for the email. The email is sent from 'noreply@salesforce.com' or support@salesforce.com and many email clients filter emails from no reply addresses.
2. Have your IT or Networking team update allowlist all Salesforce IPs and Domains in this article Salesforce IP Addresses and Domains to Allow
3. If you receive the following error, please wait an hour after the first of the 5 attempts, and request another code. Note: Salesforce has a limit of 5 email verification codes per hour.

If you need immediate access, and the above steps didn’t work, you may use these workarounds:
 

1. An administrator may add your IP address to the Trusted IP list under Setup | Security Controls | Network Access. To learn how, please review Set Trusted IP Ranges for Your Organization.
2. If you are not getting the code via email, and you have SMS verification enabled in your org, you may have an administrator add a mobile number to send the code via SMS (Text Message). To learn how, please review Verify a valid mobile number.  Also, another option when you are not getting the code via SMS, you may have an administrator disconnect the mobile number to send the code via email.
3. Some users may set their clock configuration and timezone configuration between the phone and device. Check the phone's date/timezone settings that come from the mobile carrier (on most phones, it's within Settings -> System -> Date & Time -> Set time automatically to your region. Other devices may vary.)  Ensure the device and computer are both an exact timezone match between configuration of timezone setup and date and time for best results.
4. Check all mail in the mailbox to ensure codes are being received and not caught in a spam filter, notify your IT desktop team to check spam filtering on the email server.
5. If none of the above information is helpful, please contact Salesforce Support by calling the appropriate Phone Support  number or contact your Account Executive where a case can be filed on your behalf.