you can't use anonymous authentication, sounds like you left the SMTP authentication section blank.
587 is for non-SSL i thought.
it should look like this:
Lowell
--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!