cnjohnson,thanks for your quick reply first.

By the way,I am attempting to figure out this problem on my own first.cnjohnson,do you think this problem is related to DNS problem?First of all,I don't have a DNS server.So,if I add DSmyisp.com to my sendmail.cf file,do you think my mail server knows how to send it out???Is it related to DNS server??

Thanks in advanced.

I rarely, if ever, work with the .cf file directly, since most of the problems I have faced have been solved through either the sendmail.mc file or one of the supporting files (alias, domaintable, mailertable, etc). That's why I encourage focussing there. If you are intent on working with the .cf file directly (BTW, it is generated from the .mc file ) then go out to Amazon.com and pick up the O'Reilly book on sendmail (the bat book IIRC).

Having said that, not having a DNS server available would cuase sendmail grief, but I think you have one...you are using a web-browser, and it needs one (DNS server), too.

So knowing how your .mc file is configured is important.

Cheers--
Charles

goto /etc/mail/sendmail.mc

Is this line uncommented:

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

If not, as is it is on RedHat 8, add 'dnl ' to the beginning of the line.

Oh yeah and then rebuild your sendmail.cf

First off,kklier,thanks for your reply.Actually,I have built sendmail.cf from sendmail.mc.Everytime when I modify something,I vi the sendmail.cf and reboot the mail server.Should I modify everything from sendmail.mc first,and rebuild sendmail.cf??

Thanks a lot.

It looks like you are running RedHat. Most likely you should be able to change to /etc/mail and then run "make". If that is not the case, then you will have to:

m4 your.mc.file > /etc/sendmail.cf

kklier,I have got this NEW error message in the mail log.

Sep 2 17:43:42 192 sendmail[4799]: h829hf0f004799: to=myname@myisp.com, ctladdr=root (0/0), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=30083,
relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (h829hfL0004802 Message accepted for delivery)

Initially,I think that my mail has been sent out successfully.However,it didn't!!!The message above seems like very positive,"Message accepted for delivery".But.....

Any suggestions are appreciated.

I don't know why I can send out the mail successfully now ,after I m4 sendmail.mc and add DSmail.myisp.com to sendmail.cf file.

However,I just want to figure out something.Everytime when I configure my mail server,should I m4 it to sendmail.cf again or simply modify sendmail.cf file???The procedure should be:

1.Configure my sendmail.mc first,and generate sendmail.cf,restart mail server.OR

2.Configure my sendmail.cf and restart mail server.

I hope you guys will give me some guidelines about this.Moreover,I can only send my mail to hotmail.com.Other mail address could not send out successfully.They are not stay in mqueue.....So,where did they go?

Can anyone help with this? I will also try some of the suggestions here, but anything else? My problem could be completely different.

http://www.linuxquestions.org/questi...d.php?t=489553

Look up smart host and your all set.
define(`SMART_HOST',`mail.cableone.net')
something like that...
that will tell your mail server to use the ISP's mailer to send mail...
I consider it a cheat option.

btw: thats a definition in the sendmail.mc file if not otherwise known.

WOW. I hope the OP hasn't been waiting 4 years for your reply.

Cheers.

This is an OLD thread but actually Had this issue on my CentOS 5 box.

To solve it, I changed the DS ( in sendmail.cf ) field and the SMART_HOST ( in sendmail.mc ) field.

What I needed to do to allow other computer to connect was to change the DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl line in sendmail.mc to the following :

DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl

then, I did "make -C /etc/mail"

Be carefull because now, everyone on your network can send emails using your server if you dont have some firewall rules.