Sendmail + AUTH

[blackwoodie]

Hi everyone !!

I have installed a mail server (fedora 4 Default sendmail and upgrated to 8.13.6) installed OpenSSL and cyrus-sasl2.

I work for a ISP company and offer the mail service to our clients, but some clients only use the mail service not the internet, we want to setup a smtp server to let our clients that are not using our internet service to send their mails via this server.

My question is, can I set up a smtp server that authentificates the senders of diferents domains ?? and how to do it ??

Thanks for your time !!

Blackwoodie

[tw56]

I was browsing through this mail server setup the other day and remembered seeing this. Maybe it will help! I use dovecot and postfix myself but maybe it will work out for you with cyrus-sasl2 and sendmail. http://www.brennan.id.au/12-Sendmail...r.html#dovecot

Clip from site..
User Email Accounts
When a standard user account is created on the server, that user is automatically granted access to login to the system and is also able to send and receive emails. The user now really only needs to configure their MUA with the details of the servers address and their account details, and email should be fully accessible.

Creating a standard user account with a false shell stops that account from being able to log into the system (a Linux login), but still allows them to use the system for the purpose of sending and receiving emails. Creating a user account using the following example, is the easiest method for creating email only accounts for friends and family where they do not require login access to the server.

[bash]# useradd -c "Alice Jones" -s /sbin/nologin alice


Email only accounts forbid a user from logging in and accessing their home directories. These accounts may not be suitable if users expect access to their "public_html" directories if they are present.

You may also consider placing all of the email only accounts into an appropriately named group for easy management.

[blackwoodie]

Thanks TW56 !!

I have read the tutorial on the page you gave me but now I have another problem, when I telnet the localhost on port 25 I get this answer:

220 smtp.domain.net ESMTP Sendmail 8.13.6/8.13.6; Fri, 18 Aug 2006 10:26:54 -0700
ehlo localhost
250-smtp.domain.net Hello localhost.localdomain [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-STARTTLS
250-DELIVERBY
250 HELP

As you can see don't appear the "250-AUTH" line, Do I miss something ??

Thanks !!
BlackWoodie

[tw56]

After installing things like cyrus-sasl with yum they will be on your system but will not be active until you configure your settings. I can't help you much cause I use postfix. In your browser go to file:///usr/share/doc and look for the cyrus-sasl-lib-2.1.21/ or whatever version folder and the sysadmin.html file. In my postfix conf files I have a line
smtpd_recipeint_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
But thats for postfix. Google for a sendmail cyrus-sasl and you should be able to look for some guides if you can't find answers in the sysadmin.html file.

[tw56]

Also try sending a mail from a yahoo or someother web account to your local server account and check your /var/log/maillog to see what kind of messages you have.