Verification emails sent as it looks in the logs, but not received by users

[tatiana]

Some users do not receive verification emails and emails to reset their password.
Tried both, internal auth0 SMTP and SendGrid SMTP. Emails cannot be find in spam. Tried accounts on different email providers and it is unpredictable on when it fails.

We have set up to send a Verification email when registering a new user, but some few users do not receive the verification emails and / or emails to reset their passwords.
There are no logs that the mail transmission failed (only Success verification email sent).

We have few users that are not able to login dt this issue and can you suggest the way to resolve this?

[lihua.zhang]

Hi @tatiana ,

Welcome to the Auth0 Community!

If the auth0 logs shows the emails was sent successfully, could you please check the logs in Sendgrid and see if any errors.

For your reference, here are a couple of FAQs and topics with the similar issue.

Emails Not Received Even If Tenant Logs Shows Success

Problem Statement We don’t receive any Auth0 emails (code or magic link, verification, etc.), but tenant logs show emails are sent successfully. Solution Please check the following items in the Email Provider: Check the sender email in the Email Provider Check the logs in Email Provider for messages related to the successful logs from Auth0 Consult Email Provider documentation on errors that might arise in their logs Contact Email Provider support if none of the others thrive results

Email Received With Delay

Problem Statement: Some users reported that password login code emails are received with delay or are lost. Solution: Emails created from Auth0 will be sent to the email provider server and then to the users. Your tenant has the Custom Email Provider implemented. By checking the tenant logs, the emails were sent out from Auth0 successfully without delay. Here are a few suggestions for debugging this type of issue: Make sure that you have SPF and DKIM configured, otherwise you run the risk…

https://community.auth0.com/t/change-password-emails-through-sendgrid-dont-send-but-test-emails-get-sent/71426/2

Thanks!