Is anyone else having issues sending email this morning?

I get a mail delivery failed message from Mailer-Daemon@mx9.orcon.net.nz with the message "14193: [03/18/2014 07:16:47] Can't connect to MySQL server on '172.16.100.140' (113)"

I've already logged a job via the request support feature on the Orcon homepage (I didn't realise there was no Orcon tech support 24x7).