4 ms·
The practical way to validate an email address is: 1: Does the domain part have either an MX or A record? 2: Does the address in that record accept mail? 3: Do
by thrownaway2424 13y ago
The practical way to validate an email address is:
1: Does the domain part have either an MX or A record?
2: Does the address in that record accept mail?
3: Does the server that accepts mail at that address respond favorably to the local part as a RCPT TO argument?
If yes, it's a valid email address.
In particular this article is wrong that emails are always 7-bit. With SMTPUTF8 you can put whatever you want in there.