PHP Fsockopen检查端口25

Question

I have written a code to check port 25 of one of my local server . The smtp server is running on the server, but when i check with fsockopen, returns a connection refused error . So how i check whether SMTP is down or up using a simple php code .

Answer 1

Are the php script and the smpt on the same machine? Have you checked the connection with telnet?

telnet your.local.server 25

Generally "Connection refused" means, what it says ;)

• smtp server is not running, or
• your server is not reachable (firewall?)