Can't recieve mail from internet

[kabutomz]

We have an exchange 2003 behind ISA Server 2004. Users can send e-mails to internet, but can recieve from internet. When i try to connect to smtp server using telnet <ip> 25 i doesn't work, even say anything, just command prompt appears again. when i tray telnet <ip> 110 it works, but smtp does not.
When i try to connect using telnet from internet i got an error "connection failed

 

[Marcs41]

either your ISP or your ISA or any other router in between is blocking port 25. Check your setup.

Marc
_{If 'something' 'somewhere' gives 'some' error, expect random guesses or no replies at all. Please specify details.
Free Tip: The F1 Key does NOT destroy your PC!
How Do You Get Great Answers To your Tek-Tips Questions?} See faq222-2244

 

[Mike555]

Do you need port 25 in addition to 110?

--
Mike
Comments can be misleading. Debug only code.

 

[Marcs41]

port 25 is for INcoming, 110 is outgoing

Marc
_{If 'something' 'somewhere' gives 'some' error, expect random guesses or no replies at all. Please specify details.
Free Tip: The F1 Key does NOT destroy your PC!
How Do You Get Great Answers To your Tek-Tips Questions?} See faq222-2244

 

[lmoe]

Are your MX records set up at your ISP or Web Host?

LMC
IT/MIS
"Never stop learning.

 

[kabutomz]

we listen on 110 for remote sites. I used portqry utility, and i got this error en i try to query tcp 25: socket error 10053.
Yes, we have our mx record pointing to isa server external ip address.

 

[Marcs41]

Start with the beginning, your router and ISA server.
Check the logs.

Marc
_{If 'something' 'somewhere' gives 'some' error, expect random guesses or no replies at all. Please specify details.
Free Tip: The F1 Key does NOT destroy your PC!
How Do You Get Great Answers To your Tek-Tips Questions?} See faq222-2244