New issue: Test email works but sending to a list doesn't

I’m running into a weird issue when trying to send an email. I set up the sending account information in the settings, and when I go to the bottom of that page, put in my email address and click Send Test, I receive the email within a second or two. But when I went to the Emails tab, created an email, and attempted to send it to a small subscriber list made up of testing addresses, nothing went out. Same if I didn’t select a list and put an email address in the test emails box. I get the message saying that it is going to start sending, but nothing shows up in the queue. I have tried it using my server for the SMTP, using Gmail for the SMTP, with Auto Cron enabled and disabled, and it doesn’t seem to make any difference. My version and support info is below. Let me know if you see anything in it that would prevent the emails from going out.

WordPress Version: 3.7.1
SendPress Version: 0.9.6
PHP Version: 5.3.3
PHP Memory Limit: 256 MByte
PHP Memory Used: 31.47 MByte
MySQL Version: 5.1.69

Database Tables:
wp_sendpress_subscribers_event OK
wp_sendpress_report_url OK
wp_sendpress_subscribers_status OK
wp_sendpress_subscribers OK
wp_sendpress_list_subscribers OK
wp_sendpress_queue OK

Ports:
Port 25: blocked
Port 465: open
Port 587: open

Support Info:
### Begin System Info ###

## Please include this information when posting support requests ##

Multi-site: No

SITE_URL: http://emailblast.arcoffortbend.org
HOME_URL: http://emailblast.arcoffortbend.org

SP Version: 0.9.6
WordPress Version: 3.7.1

Platform: Windows
Browser Name: Firefox
Browser Version: 25.0
User Agent String: Mozilla/5.0 (Windows NT 6.2; WOW
64; rv:25.0) Gecko/20100101 Fire
fox/25.0

Database Tables:
wp_sendpress_subscribers_event OK
wp_sendpress_report_url OK
wp_sendpress_subscribers_status OK
wp_sendpress_subscribers OK
wp_sendpress_list_subscribers OK
wp_sendpress_queue OK

Sending Method: SendPress_Sender_Gmail

PHP Version: 5.3.3
MySQL Version: 5.1.69
Web Server Info: Apache

PHP Memory Limit: 256M
PHP Post Max Size: 8M

WP_DEBUG: Disabled

WP Table Prefix: Length: 3 Status: Acceptable

Show On Front: posts
Page On Front: #0
Page For Posts: #0

Session: Disabled
Session Name: PHPSESSID
Cookie Path: /
Save Path: /var/lib/php/session
Use Cookies: On
Use Only Cookies: On

UPLOAD_MAX_FILESIZE: 128MB
POST_MAX_SIZE: 8MB
WordPress Memory Limit: 40MB
WP_DEBUG: Off
DISPLAY ERRORS: N/A
FSOCKOPEN: Your server supports fsockopen.

ACTIVE PLUGINS:

SendPress: Email Marketing and Newsletters: 0.9.6

CURRENT THEME:

Twenty Thirteen: 1.1

### End System Info ###

http://wordpress.org/plugins/sendpress/