hmm same problem here, tried it with 1.5.2 and now 1.6Beta3
everytime i have a Generic Login Error.
Changed also the value from false to true and it still doesnt work.
Here are the log.php errors
Session "default" started at 2009-11-19T16:51:28+0000
#1 ERROR: Error: fsockopen() [<a href='function.fsockopen'>function.fsockopen</a>]: unable to connect to ssl://pop.gmail.com:995 (Connection refused) in '/home/samosa/public_html/opengoo_beta/opengoo/library/PEAR/Net/Socket.php' on line 136 (error code: 2)
#2 ERROR: Error: Undefined variable: errMessage in '/home/samosa/public_html/opengoo_beta/opengoo/application/controllers/MailController.class.php' on line 1109 (error code:

Time since start: 0.58614897728 seconds
-------------------------------------------------------------------------------
Session "default" started at 2009-11-19T16:51:31+0000
#1 ERROR: Error: fsockopen() [<a href='function.fsockopen'>function.fsockopen</a>]: unable to connect to ssl://pop.gmail.com:995 (Connection refused) in '/home/samosa/public_html/opengoo_beta/opengoo/library/PEAR/Net/Socket.php' on line 136 (error code: 2)
#2 ERROR: Error: Undefined variable: errMessage in '/home/samosa/public_html/opengoo_beta/opengoo/application/controllers/MailController.class.php' on line 1109 (error code:

Time since start: 0.901312112808 seconds
Warmest regards