	[x] Posted via EE Mobile
	Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.

Question

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

5.8

Re-Listed on Blacklist, even AFTER closing port 25.

Asked by VCSLI in Networking Hardware Firewalls, Network Operations, Miscellaneous Security

Tags: Hardware Firewall, Security, Network Maintenence, Spam, Email, Virus

Hello

I work in an office building. There are 36 tenants who rent offices within the building. They are all supplied with a common shared internet connection. (Everyone in the building uses the same connection.)
A few days ago, were were blacklisted. After contacting the lister, they agreed to remove us.

We are now listed again a few days later.
We have a SonicWall Pro 2040 Enhanced, and have closed port 25 from WAN to LAN.
Since there are many different tenants, everyone uses their own email service. Whether it be NetworkSolutions (the only people who have noticed a problem, and caused me to look into this initially), Bluehost, Gmail etc etc etc. Some people use the web interface, others use Outlook/Thunderbird. There are no central Exchange servers.

I am thinking perhaps spam is being sent out on a different port, other then 25.

What could be causing this? What can i do to prevent this from happening?

View the Solution FREE for 30 Days

20091111-EE-VQP-92 - Hierarchy / EE_QW_3_20080625

Hall of Fame

1. JFrederic...297,897
2. dpk_wal190,976
3. lrmoore161,519
4. ccomley129,179
5. 3nerds127,950
6. ikalmar126,061
7. MikeKane125,898
8. kenboonejr82,375
9. rsivanandan61,654
10. sangamc58,732
11. bignewf57,701
12. Qlemo55,902
13. deimark52,350
14. asavener50,645
15. stsonline50,575
16. rochey2...50,250
17. uetian170742,279
18. RobWill40,834
19. jodylemoine39,020
20. that1guy1538,762
21. nodisco37,800
22. harbor23535,405
23. PeteLong35,050
24. arnold33,871
25. equalizer33,150

1. lrmoore1,423,270
2. JFrederic...507,441
3. batry_boy488,895
4. RobWill455,233
5. dpk_wal445,633
6. rsivanandan326,996
7. harbor235212,034
8. ccomley171,466
9. MikeKane153,388
10. PeteLong134,731
11. 3nerds127,950
12. ikalmar126,061
13. nodisco124,822
14. grblades123,979
15. Cyclops3...116,570
16. giltjr110,457
17. MrHusy98,341
18. pseudocy...90,643
19. Voltz-dk87,658
20. RPPreacher86,116
21. arnold85,917
22. kenboonejr82,375
23. Qlemo77,869
24. calvinetter76,413
25. donjohnston76,205

Re-Listed on Blacklist, even AFTER closing port 25.

Asked by VCSLI in Networking Hardware Firewalls, Network Operations, Miscellaneous Security

Tags: Hardware Firewall, Security, Network Maintenence, Spam, Email, Virus

About this solution