Dear all, For some reason, we have to empliment swecondery mail server. But we are having problems. When we try to send mail from our secondery mail server, the mail just bounce back to that user.

When i have tried to send a mail to my yahoo box the following message return to my email box(imtiaz@atcl.net(This user is existing in secondary mail server)[secondary mail server IP=202.51.183.7]



On my Name server, I have the entry of Secondery mail servers.
It is MX 20

Here is some hints from my config files ( secondery mail server ) :

#/etc/mail/access
-----------------------
localhost.localdomain RELAY
localhost RELAY
127.0.0.1 RELAY
192.168.1 RELAY
202.51.183 RELAY


#/etc/mail/local-host-names
--------------------------------------
atcl.net
ns2.atcl.net

#/etc/mai/sendmail.mc
---------------------------------------
define(`SMART_HOST',`ns2.atcl.net')
define(`SMART_HOST',`[202.51.183.7]')

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
DAEMON_OPTIONS(`Port=smtp,Addr=202.51.183.7, Name=MTA')dnl


Waiting. Help me guys

Thanx in advance

#/etc/mail/local-host-names
--------------------------------------
atcl.net
ns2.atcl.net

Exactly why are you specifying your domain names in local-host-names on the secondary? Typically...

1) A secondary mail server should NOT contain any local mailboxes. It should relay all e-mail to the primary mail server where the mailboxes exist.
2) A secondary mail server should be configured to query the primary mail server for a list of valid mailboxes prior to relaying.
3) A secondary mail server should be configured the same as the primary for UCE filters, otherwise spammers will use it as a backdoor for delivery.

#/etc/mai/sendmail.mc
---------------------------------------
define(`SMART_HOST',`ns2.atcl.net')
define(`SMART_HOST',`[202.51.183.7]')

If I understand your post correctly, you are specifying your own mail server (the secondary) as the smart host. Bzzt! Loop alert!

If you must setup a secondary, try the following config changes. I'm assuming all mailboxes exist on the primary mail server.

1) Remove ALL entries from /etc/mail/local-host-names
2) Add your domain name atcl.net to /etc/mail/relay-domains
3) Add your domain name to /etc/mail/mailertable. Ex:
atcl.net smtp:[ip of primary]
4) Your smart host entries should point to your primary mail server or your ISP's mail server.

Thank you for you help.

Primary Server: name: ns1.atcl.net
IP: 202.51.183.6
(primary mailserver,web,ns1)

Secondary Server: name: ns2.atcl.net
IP: 202.51.183.7
(secondary mail server, Proxy, ns2)

------------------Secondary Mail Server Configuration ------------

1) Remove ALL entries from /etc/mail/local-host-names
Ans: I removed, ok
2) Add your domain name atcl.net to /etc/mail/relay-domains
Ans:ADDED, ok
3) Add your domain name to /etc/mail/mailertable. Ex:
atcl.net smtp:[ip of primary]
Ans:ADDED

4) Your smart host entries should point to your primary mail server or your ISP's mail server.
Ans:
define(`SMART_HOST',`ns1.atcl.net')
define(`SMART_HOST',`[202.51.183.6]')

Note : In SMART_HOST I use Primary Server(ns1.atcl.net) name and IP(202.51.183.6) Address
----------------------------------------------------------------------------------------------

I have some questions.

1. I am using my primary server IP (202.51.183.6) as a POP & SMTP into my Outlook express mailer. If my primary server failed is this will be working(my POP and SMTP address)?(at my sendmail.mc file, I din't use my secondary IP(202.51.183.7) there)

PLS answer

2. If my primary server is down then my secondary will give me the email facility but when my primary server will be up again; how my secondary mail sever will send evey mail to the primary server ? Is this possible?

PLS Answer.

Thanx in advance

Why are you listing the same smart host twice? This makes no sense to me. List one or the other.
If I understand your question correctly - If your primary server is down, inbound e-mail will be accepted (smtp) by your secondary mail server, but all pop access will not work because the mailboxes only exist on the primary. This is why implementing a secondary mail server when the primary is "both" the smtp and pop server is pointless.
Sendmail will automatically queue all accepted e-mail when the primary is down and retry delivery based on the queue runner specified at startup. i.e. If the queue runner is set to one hour, then sendmail will retry delivery to the primary every hour.

Thanx a lot. really really.
Now everything is clear to me. Just clear.
All the best scowles.