I have firebase email link authentication configured as it is told in the docs. But a few users don't get the sign in email. Why is this happening. One of my friends tried to login with one email and didn't get the email. He then tried with another email and it worked.
I am also not getting an email on some of my emails.
How do I resolve this issue?
Firebase makes no distinction based on the email addresses. Most likely the message got marked as spam for some of your friends. Have them check the spam box of their mail client, and any spam filters they have on their network.