SMTP Config

Discussion in 'Installation/Configuration' started by Cracklefish, May 8, 2009.

  1. Cracklefish

    Cracklefish Member

    I think that there is unprotected public access to my smtp server. I can send email via this server which is on the office network, from home, without any authentication

    How should I configure it so that external clients have to authenticate but internal clients get direct access?

    I am running Suse11.1 with ISPConfig 3 and using the Suse firewall
     
  2. till

    till Super Moderator Howtoforge Staff HowtoForge Supporter ISPConfig Developer

    It does not meamĀ“n that your server is a open relay if you can send from the internal network. Use a open relay test which are available on the internet to test if your server is really a open relay.
     
  3. Cracklefish

    Cracklefish Member

    The open relay test says the server is not open.

    I don't understand what is going on as I can access this server when I am connected to the internet on an external ip address albeit using the same ISP ie my home not the office. Surely this should not be possible.

    However I would like to set up a relayhost - How?
     
  4. till

    till Super Moderator Howtoforge Staff HowtoForge Supporter ISPConfig Developer

  5. Cracklefish

    Cracklefish Member

    Sorry, my inexperience and ignorance is showing! I have obviously used the wrong terminology.

    Currently we have an account with an ISP that allows us worldwide access to their SMTP server but requires a password and username ( is this authenticated access?) I want to provide this facility on our mail server.
     
  6. falko

    falko Super Moderator Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    So you want a mail server that others can use to relay emails? All you need is SMTP-AUTH and an email account (together with a username & password). The username and password is what the other servers need to authenticate.
     
  7. Cracklefish

    Cracklefish Member

    I only need it for mail clients.

    I was rather expecting it to work like most ISP systems that I have encountered. ie. Internal clients don't need to authenticate but external clients do.

    I have not been able to confirm how an external client functions today. but when I send an email from the office network, if the recipient is an internal mail box I don't need to set a username and password but if the recipient is external (eg anybody@hotmail.com) then I have to set username and password. It seems to accept any valid uname/psswd not just the one for the sending account.

    If that is correct then I am happy.

    Now I have to find out why the spam filter is not functioning!

    Right now I'd sooner have a user manual than last weeks winning euromillions ticket!

    Thanks for the help, I'll get there soon.
     

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