How to block temporary or fake generated emails
87208
How to block Disposable Email Addresses in your website's registration form?
2319
How to validate an email address using a regular expression?
119731
Postfix check outgoing mail for spam
2101
How to validate an email address in JavaScript
125458
How can I send email to user that is not logged in since 30 days?
157313
Is it worth obfuscating email addresses on the web these days?
32842
Is there an implementable (non-theoretical) way to prove if email address belong to real email account?
75197
I can't send email via my own Postfix anymore due to enforced restrictions that I made
1832
Prevent mail being marked as spam
19208
Email messages going to spam folder
119508
Make Google stop sending 'new sign in from ...' emails
45731
Spam iCloud Calendar Invitations
144976
Blocking comment spam without using captcha
154028
Disable mail check on login?
123788
Remove the extra headers from the e-mails sent
152317
Block local (unix) users from sending mail
128573
Email mistakenly marked as spam