Email Service Failed Silently

[JacobLinCool]

Some users cannot receive the verification email.

@DWyatb I think this happened to you before, can you provide some additional context about your situation?

[DWyatb]

After I clicked the "Resend" button, I successfully received the verification email on 5/27. However, the verify website displayed an "invalid token" message.

But when I tried clicking the "Resend" button again today, it was successful.

In addition, I was able to successfully register another account on my first attempt.

[JacobLinCool]

UPDATE:
I can't reproduce it, and there is no related error in server log.
Sometimes the email delivery will have a delay, but it never drop for gmail.

[JacobLinCool]

After I clicked the "Resend" button, I successfully received the verification email on 5/27. However, the verify website displayed an "invalid token" message.

The link in the email will expired in 10 minutes, and if you send the email from local, it won't work on unicourse.tw since the secret to sign is different.