Error when changing email address

[Alex.]

http://discoverygc.com/wiki/Special:ChangeEmail
When you submit the form with a new address, you get back "Error sending mail: Unknown error in PHP's mail() function."
Can a server administrator please look into the mail configuration?

[Remnant]

Oh. We fixed the forums configuration. I guess we missed the Wiki config.
Just PM me your current email address, and what you want the new one to be.

I'll fix the thing in a day or so.

[Alex.]

It looks like it accepted my new email address anyway... Looked around preferences a bit and it seems email notifications are mostly disabled though (password resets should still work, but appear not to).

I also noticed that the wiki is running a really outdated version of MediaWiki (1.19.1) - according to https://www.mediawiki.org/wiki/Version_lifecycle only 1.23+ is supported now, and the last version of 1.19 was 1.19.24, with plenty of security fixes between .1 and .24...