Is it possible to look up a Stack Exchange user by their email address?
72937
Finding user using an email address
35064
Is Stack Overflow merging two different accounts by email without the user's consent?
96280
How to enforce sender address to be "logged-in-user@example.org" in Postfix?
134463
Why is my StackExchange OpenID so hard to find?
92092
How to search for questions and answers between two users?
152808
How to Filter Emails Forwarded to Gmail Alias?
55093
How can I add a Stack Exchange login to my preexisting account?
96155
Is it possible to collect data from SE users to understand their usage of the site?
95027
Was Stack Exchange named after Experts Exchange?
95312
Does Stack Exchange prevent cheating with "fake" accounts?
135412
Does Stack Exchange have an email notification option?
34512
How do I hide my accounts on a specific Stack Exchange site?
41311
To Check if Org-wide email is verified in APEX
32842
Is there an implementable (non-theoretical) way to prove if email address belong to real email account?
94269
Is there a way to follow a user on Stack Overflow?
18092
How do I change the email address associated with my Stack Exchange OpenID?
126983
email field or username for logging in an application?