HITarcHITects

yes! I can make other tests for you if you need.

Thank you for your help!
here the information, let me know if you need more.

WordPress Version: 3.8.1
SendPress Version: 0.9.9.5
PHP Version: 5.4.4-14+deb7u2
PHP Memory Limit: 256 MByte
PHP Memory Used: 17.8 MByte
MySQL Version: 5.5.13

Database Tables:
wphit2_sendpress_subscribers_event OK
wphit2_sendpress_report_url OK
wphit2_sendpress_subscribers_status OK
wphit2_sendpress_subscribers OK
wphit2_sendpress_list_subscribers OK
wphit2_sendpress_queue OK

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

### Begin System Info ###

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

Multi-site:               No

HOME_URL:                 _

SP Version:               0.9.9.5
WordPress Version:        3.8.1
Sending Method: 		  SendPress_Sender_Website
SendPress Tables:		   Tables Installed

PHP Version:              5.4.4-14+deb7u2
MySQL Version:            5.5.13-enterprise-commercial-advanced-log
Web Server Info:          Apache/2.2.14 (Unix)

PHP Memory Limit:         256M
PHP Post Max Size:        40M
PHP Memory Used:		  17.8 MByte

WP Memory Limit:          40MB
WP_DEBUG:                 Disabled

UPLOAD_MAX_FILESIZE:      10MB
POST_MAX_SIZE:            40MB
DISPLAY ERRORS:           On (1)
FSOCKOPEN:                Your server supports fsockopen.

Platform:                 Windows
Browser Name:             Firefox
Browser Version:          28.0
User Agent String:        Mozilla/5.0 (Windows NT 6.1; WOW
			  64; rv:28.0) Gecko/20100101 Fire
                          fox/28.0

ACTIVE PLUGINS:

Autoptimize: 1.8.4
Google Doc Embedder: 2.5.12
Google XML Sitemaps: 4.0.2
Jetpack by WordPress.com: 2.9.2
List category posts: 0.46.4
SendPress Newsletters: 0.9.9.5
WooDojo: 1.5.4
WP Redirects: 131121
WP SlimStat: 3.5.8
WP SlimStat Dashboard Widgets: 3.1.5

CURRENT THEME:

Arctic: 2.1.1

### End System Info ###

[Moderator Note: Please post log files or similar between backticks or use the code button.]