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Accessing Sendmail from Network Clients

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by steve.leach

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I have configured Red HAt Linux V6.1 with Sendmail as shipped. DNS is on Windows NT and works fine. Using Linuxconf I have configured Sendmail and on the Linux system it's fine. Clients on the network can send mail to users on Linux box and it is received. Users on Linux can send mail to clients users on rest of network and mail is queued. I have however been unable to collect mail from say outlook express for the clients outside the Linux box. Any ideas?

5 replies

by rkeckler2000

It looks like on of two things. 1. The DNS is not set up correctly. If this is your only email server. In each of your DNS zone files (mydomain.com) you must use the MX record to point to the Linux 'Sendmail' Box.
2. As a default, Sendmail is not setup to relay messages from outside of its domain. Look in the /var/log/maillog file for any errors. You might have to add domains or ip address to the /etc/mail/access file to allow relaying. Search http://www.sendmail.org for the info. You will have to do a makemap for the access file.

by jpereira

I assume that mail for the clients is being queued in the sendmail queue /var/spool/mqueue. This means that sendmail cannot deliver to the clients which is not surprising if they are Windows boxes just running Outlook Express. OE does not supply SMTP services.
If the latter, you'll need to configure sendmail to accept mail for all of the clients and define Unix accounts for those clients. You'll then need to enable the POP3 service or the IMAP service on the Linux box and configure Outlook Express to talk to the Linux box using either POP3 or IMAP.

Have fun, feel free to contact me by e-mail if you want more detailed help.

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