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i wanted to use this as an email server to receive and send emails from ubuntu server. i had nagios installed on my ubuntu, installed postfix too, so i thought i could somehow make use of this evolution setup assistant
Am I missing something or do I not understand you? You want to use your own Ubuntu server for sending and receiving mails, is not it? Then why evolution? You need to configure your Ubuntu server first for the job. And then your evolution client.
As for the evolution configuration,
receiving server is your imap or pop3 server that you have been assigned by the mail provider. And sending server is the smtp server name. Both should be provided by the mail provider itself.
You need to read more. Evolution is the email client. Not a mail server. Postfix is the smtp server. You do not need to install it if you do not intend to host a mail service.
Where do you have your email hosted? Or you use a mail service from gmail, yahoo or such?
Hmm. First i just want to try send mail on the localhost (ubuntu machine) When that works, i want to try other mail services like hotmail,gmail etc. I'm using Nagios on ubuntu 9.10. Send email notifications when server is down in nagios
I am still not able to understand you then. If you have postfix installed, then you only have smtp server. Not the IMAP or POP3. SMTP will just allow you to send emails not receive them. Evolution will need both sending server as well as receiving server. And if you need to just send mails, postfix should be enough.
Read postfix documentation on how to configure it and then use mutt or email command line clients to send mails to check your configuration.
The default configuration for postfix should allow you to send and receive mails on localhost as far as my knowledge goes about postfix.
You can not directly send mails from your internal server to gmail without any internet records. It will not work that way. To send mails to external server, you will need to use relay for the purpose. Check the documentation on how to set a SMTP relay with authentication in postfix.
I do not have lot of experience with postfix and have not used it extensively. So my help is going to be very limited.
I know i can't just directly send mails to gmail/hotmail etc. For now i just wanted to let Nagios notify me when services are down in localhost (by sending an email to localhost). That will do for me (:
I suggest you read the first link to get some understanding on the issue. If you want fast result so that you can get your Nagios notifications out the door, then follow the last link, and after that read the first to understand what you did