I have came across the same error on two different 5.0.0e installs. One of the installs was upgraded from 5.0.0d and the other a fresh clean install. The first is in IIS with MySQL 5.1 and the second is in Apache with MySQL 5.1

The error states:

Code:
Query Failed:UPDATE outbound_email SET id = '728704f6-37e8-50c9-f8da-4831a7a21291', name = 'system', type = 'system', user_id = '1', mail_sendtype = 'SMTP', mail_smtpserver = 'mail.removed.com', mail_smtpport = '25', mail_smtpuser = 'shane@removed.com', mail_smtppass = '1Sj1yK1e0EX111HL4db2w==', mail_smtpauth_req = '1', mail_smtpssl = ''  WHERE id = '728704f6-37e8-50c9-f8da-4831a7a21291'::MySQL error 1366: Incorrect integer value: '' for column 'mail_smtpssl' at row 1
It appears that the DB is looking for the mail_smtpssl value to be either a 0 (zero) or 1 (one), but if left blank it is leaving the update query blank as well.

I am fairly new here, anybody know where I should report this as a bug?

Thanks,
Shane