Wierd Email SMTP Issue

[columbusdjkc]

I'm not really sure and I'm wondering if anyone can help me out. I'm using the new plesk. My DNS is being hosted by Zone Edit and my A records and MX records are pointing at my server. Now, some people can telnet into port 25 just fine and those people can mount into an outlook account easily. However on none of the machines that I have can I telnet to 25 and get no response. Nor can I mount the account in Outlook.
I have looked over the config files that everyone has discussed in relation to the SMTP issues with 8.4 and my config files all ready have those settings. Does anyone have any ideas? Or what information can I provide to better assist you in assisting me?

Thanks guys
Anthony

 

[ziba@]

Hi,

If you cannot telnet to port 25 on your Plesk server from some particular machines then you should check if there is firewall on your server/external firewall on router blocking access to port 25 on your Plesk server for some IP addresses.
Additionally you can test this from machines that you are trying to telnet from using nmap utility. For example:
nmap -P0 -p25 IP_OF_YOUR_PLESK_SERVER

 

[columbusdjkc]

Interesting ports on opensorce.org (64.251.21.234):
PORT STATE SERVICE
25/tcp filtered smtp

Nmap done: 1 IP address (1 host up) scanned in 8.078 seconds



So does that mean it's filtered from the server end, or from my end here locally. Is there a way to resolve this through plesk or is this the hardware router?

 

[huck]

Many ISPs block port 25. Contact your ISP. You can run SMTP on port 26 (there may be a forum post or kb article). Just today I had this issue with a client. We had to add port 26 to smtp so he could get around his ISP's block. I don't advocate doing this as it can often violate your ISP's TOS.