Failure sending mail error

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hi there everybody

I have a dedicated server and can configure IIS

locally when i test to send mail everything's ok but on server it gives "sending mail failure"

please help me what's the problem and how can i solve that

thanks in advance

Posted 1-Jan-11 10:02am

M0$!98

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Manfred Rudolf Bihy 1-Jan-11 17:11pm

Update: See my comment on my answer.

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Manfred Rudolf Bihy · Answer 1 · 2011-01-01T10:26:00

Solution 1

Open a command prompt on your server and type somthing like this:

telnet name.of.your.mailserver 25

If the connection fails you can't reach your mail server from the server your application runs on. Likewise typing this:

nslookup name.of.your.mailserver

will tell you if your server can resolve the mailservers name to an IP address. Try these commands and tell me in a comment to my answer what results you received. You shouldn't tell me any IP addresses though just comment if nslookup command was able to resolve the name.

Best Regards,

Manfred

Posted 1-Jan-11 10:26am

Manfred Rudolf Bihy

Comments

M0$!98 1-Jan-11 16:36pm

thanks for your answer.couldn't open connection for telnet
and can't find server name for nslookup was the result.
now what can i do!?

Sergey Alexandrovich Kryukov 1-Jan-11 16:49pm

This is a good answer (5 from me).
M0$!98148, now you have some diagnostics. Everything else is the configuration of your mail server. As far as I understand you, the server is under your control, is that right? If so, this is your responsibility to set up the mail server properly :-)

Manfred Rudolf Bihy 1-Jan-11 16:56pm

@M0$!98: As SAKryukov said in his comment above, now it is time you ask yourself (and someone who knows your network) some questions:
- Why can I reach name.of.my.mailserver from my local machine but not from my server?
- Why can't my server resolve the name of my mailserver to an IP address?
- Is my server in a DMZ?
- Is my server protected by a firewall?
- Where exactly is my mailserver at in relation to my server?
etc. etc.

There are many possiblities that can cause that kind of behavior and it would be hard to nearly impossible solving that here in a discussion.

Sergey Alexandrovich Kryukov 1-Jan-11 18:33pm

@M0$!98, I advice you to accept this answer first and get to your server.
Any further questions will not fit in the scope of this Web page. If you have more specific question on the server installation down the road, pose a brand new question and provide enough information.