I just registered to Area 51 and it sent a confirmation email to my old (already-changed) email address
51458
A user's original email address is retained in the system even after they've changed it on all sites (privacy risk, potential Area 51 sync issues)
39241
Lost my Stack Overflow account when I trashed my e-mail address
96598
Received an email saying someone has hacked my email account
15887
What does fulfilled next to Beta Site name in Area 51 mean?
119354
Sandbox modifies subject on email sent from trigger
66665
How to prevent an email from accidentally being forwarded?
97959
Something weird is going on with my login on at least one site
55681
Log-in bug with Area 51
88258
Can I recover a stack overflow account with a dead email address?
135412
Does Stack Exchange have an email notification option?
128573
Email mistakenly marked as spam
87648
Is it possible to check if an email is confirmed on Facebook?
65668
changed primary email in google account. how to log in?
51982
How can I change my login email address for Stack Overflow?
18092
How do I change the email address associated with my Stack Exchange OpenID?
9521
Why is Google using a (new) 2 step Gmail sign in process?
66783
How do I delete a previous recipient's email address from Mail?