Problem:
Unwanted delay in “verify your email” for some domains. The delay is usually ~10 minutes but we have observed +1h as well. For some email addresses, the email is received immediately.
Setup:
- Use our own Email provider (Mandrill)
- email addresses that are experiencing delays are set up with G Suite (google) with a third-party DNS host.
- email contains html, css, link to image (static asset), link to our web app.
Investigation:
From email header of a delayed email (screenshot of analysis attached)
On auth0, when configuring Email provider, there is a heads up:
Heads up! If you are trying to access a service behind a firewall, make sure to open the right ports and allow inbound connections from these IP addresses:
but I do not think it applies to our case as the header analysis suggests that Google is the issue?
RE No verification e-mails sent – yes, the Status switch is ON.
Does anyone have an idea?
Really appreciate the help as email-verification is required to access our app, making it a poor UX for our users.
Thanks in advance!