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Wikipedia requires that users confirm their email addresses before they can use email features. This helps to prevent problems with bad addresses or spam. You only need to confirm email addresses to use the email system; you can log in and edit pages without confirming your address. You are not even required to enter an email address to register; it is optional. (However, administrators are expected to have a confirmed email address.)
You can check your address confirmation status in your preferences. If your account was registered prior to March 2, 2006 (when confirmation was enforced), your existing address (if any) has not been automatically confirmed. If you change your email address, you will automatically be sent a new confirmation email.
dig, and ensuring that the rightmost column in the
ANSWER SECTIONis a domain name and not an IP address. For example, gmail.com is OK here:
$ dig gmail.com mx ; <<>> DiG 9.6.2-P1-RedHat-9.6.2-2.P1.fc11 <<>> gmail.com mx ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51836 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;gmail.com. IN MX ;; ANSWER SECTION: gmail.com. 1912 IN MX 40 alt4.gmail-smtp-in.l.google.com. gmail.com. 1912 IN MX 5 gmail-smtp-in.l.google.com. gmail.com. 1912 IN MX 10 alt1.gmail-smtp-in.l.google.com. gmail.com. 1912 IN MX 20 alt2.gmail-smtp-in.l.google.com. gmail.com. 1912 IN MX 30 alt3.gmail-smtp-in.l.google.com. ;; Query time: 15 msec ;; SERVER: 188.8.131.52#53(184.108.40.206) ;; WHEN: Fri Apr 23 02:24:50 2010 ;; MSG SIZE rcvd: 150