When attempting to book an event, I get the following email server connection errors.
Warning: fsockopen() [function.fsockopen]: unable to connect to localhost:25 (A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. ) in class.smtp.php on line 106
Message was not sent
I updated the options to use SMTP and PHP mail function. Both are producing the same result.
Oddly, WordPress email notifications are not affected. It could still be an email server issue, but wanted to check here first.