Unable to send emails through outlook .. ISA blocking port 587
Hello All, 

I am sending this message after searching every possibility through google but haven't figure out the problem. 

I have ISA server 2006 installed with service pack 1 and its already updated. I am using Edge template to configure network settings. In our area ISP has blocked smpt port 25 due to spams going through that. So we only have let with two ports i.e. 587 or 465 with ssl. I wan to let my windows 2003 server domain users to use port 587 for sending their emails trough outlook. Please note that our exchange server is situated in USA (we are in Pakistan) and through a client computer and through ISA i am able to ping that. Also i have configured DNS as first policy then SMTP, SMTPS as secnond and HTTP & HTTP as third and then the default deny policy. Please also note that through smtp port 465 (SSL) works fine but don't now about the CA. 

I noticed in the loging activity that 587 port denies by the ISA with a message that un identified traffic. I have also configured TMG on my network and the same issue occurs. 

Could any buddy please help? 

Regards, 
January 11th, 2014 9:58am

Dear Quan,

thank you very much for your reply. could you please tell me how can I use http://www.isatools.org/tools/isa_tpr.js for managing tunnel ports?

regards,

January 13th, 2014 5:57am

Hi,

Please refer to the article below to get more information about that.

http://technet.microsoft.com/en-us/library/cc302450.aspx

Best Regards

Quan Gu

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January 13th, 2014 9:14pm

Dear Quan,

Here is the log it might be useful to figure out the problem.

Thanks,

January 14th, 2014 2:37am

Here is the smtps rule along with port 587 and please note that in its properties the port range is 465 TCP outbond which i can't change into 587.

T

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January 14th, 2014 2:41am

thanks all for your suggestions and also for having a look at my post. the internet provider has opened the default smpt port and so no further problems while sending emails through outlook.

best regards,

January 18th, 2014 2:20am

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