I had the same problem, and the only thing that works is disabling permalinks on wordpress, which I really don’t want to do.
I have this working on our website, but was attempting to move to a different server (moving from a Windows server to a Linux server). Everything else seems to be working except previewing the emails (I haven’t tried sending one yet since the preview isn’t working).
If the format is /emails/ it fails, but if the format is /?sp_newsletters= then the preview works just fine. I’ve tried all the steps in the KB without any luck.
Here’s my support info:
### Begin System Info ###
## Please include this information when posting support requests ##
Multi-site: No
HOME_URL: [REMOVED]
SP Version: 0.9.9.9.3
WordPress Version: 3.9.1
Sending Method: SendPress_Sender_Website
SendPress Tables: Tables Installed
PHP Version: 5.5.9-1ubuntu4.1
MySQL Version:
Web Server Info: Apache/2.4.7 (Ubuntu)
PHP Memory Limit: 256M
PHP Post Max Size: 50M
PHP Memory Used: 7.24 MByte
WP Memory Limit: 40MB
WP_DEBUG: Disabled
UPLOAD_MAX_FILESIZE: 50MB
POST_MAX_SIZE: 50MB
DISPLAY ERRORS: N/A
FSOCKOPEN: Your server supports fsockopen.
Platform: Windows
Browser Name: Chrome
Browser Version: 36.0.1985.18
User Agent String: Mozilla/5.0 (Windows NT 6.3; WOW
64) AppleWebKit/537.36 (KHTML, l
ike Gecko) Chrome/36.0.1985.18 S
afari/537.36 OPR/23.0.1522.14 (E
dition Next)
ACTIVE PLUGINS:
Apple Meta Tags: 1.0.0
Aspire Smart FAQ plugin: 1.0
Broken Link Checker: 1.9.3
Child Page Navigation: 1.3.3
Contact Form 7: 3.8.1
Disable Comments: 1.1
Display Widgets: 2.03
Exclude Pages from Navigation: 1.92
Flamingo: 1.1.1
Flexi Pages Widget: 1.6.13
Google Analytics Dashboard for WP: 4.2.20
iThemes Security: 4.2.13
Page-list: 4.2
Really Simple CAPTCHA: 1.8
Redirection: 2.3.4
Royal Custom CSS for Page and Post: 1.0
SendPress Newsletters: 0.9.9.9.3
SEO Smart Links: 2.7.8
Shutter Reloaded Plus: 0.6
Simple Page Ordering: 2.2.1
SP FAQ: 2.2
TablePress: 1.4
Wordfence Security: 5.1.4
WordPress SEO: 1.5.3.3
WP-Optimize: 1.8.6
WP-Piwik: 0.9.9.12
WP Image Borders: 1.5.3
WP Super Cache: 1.4
XCloner: 3.1.1
CURRENT THEME:
Gridiculous: 1.0.9
### End System Info ###