Results 1 to 7 of 7

Thread: How to stop unauthenticated user to send mail to my mailserver

  1. #1
    sadiq007 is offline Special Member
    Join Date
    May 2009
    Location
    INDIA
    Posts
    104
    Rep Power
    6

    Exclamation How to stop unauthenticated user to send mail to my mailserver

    Hi friends,
    port 25 and port 587 both are open at my mail-server... using port 587 user must need user-nameassword for sending mail..... but using port 25 no user-nameassword need to send mail to my mail-server users.... any non-exist user can also send mail to my users by using port 25 without authenticate. also my mail-server is not an open-relay.
    So how can i stop sending mail from my mail-server( from email client like outlook etc) to my local users or any external emails for unauthenticated users. Simply i want that only authenticated users can send mail to my users.

  2. #2
    uxbod's Avatar
    uxbod is offline Moderator
    Join Date
    Nov 2006
    Location
    UK
    Posts
    8,017
    Rep Power
    24

    Default

    Uh; so you want nobody, unless they have a account with you, to be able to send your users email ? Port 25 is designed to receive email without authentication. If you do not want that then block port 25

  3. #3
    sadiq007 is offline Special Member
    Join Date
    May 2009
    Location
    INDIA
    Posts
    104
    Rep Power
    6

    Default

    hi UX,
    i want nobody from my domain ,unless they have account with me. i also try to close port 25 , but in that case i am not able to receiving mail from external domains like yahoo, gmail,hotmail etc.I mean any extrenal domain users and my domain users can only mail to my users. i just want to stop non-exist user from my domain(non-existuser@mydomain.com) to send mail to my exist users. and also want to set that only authenticated local users can send mail to my domains users.

  4. #4
    uxbod's Avatar
    uxbod is offline Moderator
    Join Date
    Nov 2006
    Location
    UK
    Posts
    8,017
    Rep Power
    24

    Default

    Search the forums for SPF records and spoofprotection.

  5. #5
    sadiq007 is offline Special Member
    Join Date
    May 2009
    Location
    INDIA
    Posts
    104
    Rep Power
    6

    Default

    DEar UX,
    i already setup SPF... then how can non-exist local user can able to send mail to my local user?

    TXT myomain.com 8 hrs v=spf1 ip4:203.137.5.3 a:mail.mydomain.com mx:mail.mydomain.com ~all

    any detail explanation to solve this problem?

    does this solve my problem? smtpd_client_restrictions = permit_sasl_authenticated, reject
    Last edited by sadiq007; 06-12-2010 at 04:12 AM.

  6. #6
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,491
    Rep Power
    56

    Default

    Quote Originally Posted by sadiq007 View Post
    DEar UX,
    i already setup SPF... then how can non-exist local user can able to send mail to my local user?

    TXT myomain.com 8 hrs v=spf1 ip4:203.137.5.3 a:mail.mydomain.com mx:mail.mydomain.com ~all

    any detail explanation to solve this problem?

    does this solve my problem? smtpd_client_restrictions = permit_sasl_authenticated, reject
    The only relevance SPF records have is for mail sent from your server, read this item in the wiki: Improving Anti-spam system - Zimbra :: Wiki
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  7. #7
    uxbod's Avatar
    uxbod is offline Moderator
    Join Date
    Nov 2006
    Location
    UK
    Posts
    8,017
    Rep Power
    24

    Default

    And look up the other item spoofprotection. We really need to see the headers from one of the emails that is getting through to help.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 7
    Last Post: 02-03-2011, 07:01 AM
  2. [SOLVED] Mailserver down when send file attach of 50Mb
    By ZMilton in forum Administrators
    Replies: 20
    Last Post: 04-10-2008, 11:44 AM
  3. Replies: 2
    Last Post: 02-12-2008, 11:55 AM
  4. Issues...
    By timothyalangorman in forum Administrators
    Replies: 3
    Last Post: 11-19-2007, 10:43 AM
  5. Fedora Core 3, Clean Install - Not working!
    By pcjackson in forum Installation
    Replies: 17
    Last Post: 03-05-2006, 07:38 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •