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My internal email is being blocked/delayed...need help figuring out how to fix it.

Hello all,

Here is my network config;

Windows 2003 Native Network 2 DCs
1 Windows 2003 Member Server
12 Win 2000 desktops
12 win XP desktops

1 Watchguard firebox x500
Symantec Antivirus Corp 10.01 having problems upgrading to 10.1 ( this is where I think the problem is)

I can send emails from the internet but sending from my client emails seem to go out but never reach their destination. Emails internally never reach their destiantion either. Problem is system wide.

Any help would be greatly appreciated.
1 Solution
Are you using Exchange Server in your domain.

Are you using MAPI or POP3/IMAP for email access.


Couple of questions:

- Please explain "I can send emails from the internet"
- What client software are you using on the PCs?  (Outlook, etc)
- Is your firewall set to block any outbound ports (from PC --> Internet)

Couple of possible solutions:

- REMOVE ALL symantec software, then install the newest version.  You should install, then run the update to get to  I had a LOT of trouble with  A LOT...

- When you do install symantec, I suggest not installing the "Email Tools" - Outlook plugin, etc.  I have found that it actually CRASHES outlook inexplicably when opening attachments (that it must scan presumably)

- Test SMTP sending from the CMD line.  Using the below link, follow the instructions for "Basic Testing".  Use the IP address or hostname of the email server you are using to send out.  If you cannot telnet to port 25 of the email server you use for outbound, then the firewall (or ISP) may be blocking port 25.


Check firewalls
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clcurriAuthor Commented:
Thanks everyone,

I don't have exchange server, I use a third party (SBC Yahoo) for my email and we use pop3 for email access.

- Please explain "I can send emails from the internet"
----Using webmail (accessing your email from the internet) I can send emails through webmail without a problem  

- What client software are you using on the PCs?  (Outlook, etc)
----We use Outlook 2000/02/03

- Is your firewall set to block any outbound ports (from PC --> Internet)

Sorry for leaving out so many details.

Thanks for all the replies I will try the removal of symantec and other listed possible solutions and post back with the results.
clcurriAuthor Commented:
I also don't see the link for the basic testing, could you re-post it.



Please try the "telnet test" also - that will rule out the firewall or your ISP blocking port 25.

Please also advise:

- What type of internet connection you have, and who provides it.  Is it a "business class" line or "consumer"...  verify with the ISP whether they block port 25.
- You can also try using the ISP's outbound SMTP servers (instead of yahoo's).

My ISP dictates that all email on port 25 MUST go through their servers.  This is with Optimum Online business class connection.



Here's the link:  http://support.microsoft.com/?kbid=153119

clcurriAuthor Commented:
Thanks for the suggestions, and after many many hours of troubleshooting the problem wound up being my ISPs servers, they didn't go into much detail about the problem just notin that a server supposedly was down -- I think it was more than that but the problem is solved.

So NYtechguy gave me the right tools to find out that it was not a problem with my servers here so I'm awarding him the points.

Thanks to everyone though.
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