550 errors in sendmail

whoa · #1 19th May 2007, 01:56 PM

hi everyone!
im trying to setup a mail server. uw-imap works fine (i can retrieve e-mails from an external computer), but trying to send a mail from my server or to my server wont work.
If i try to send an email to let's say admin@mydomain.com, i am given the error '550 Unkown recipient', even though the account exists and is in my virtusertable.
If im trying to send and email from admin@mydomain.com, i am given the error "550 5.7.1 <me@myisp.com>... Relaying denied".
I have been trying to follow a whole bunch of different tutorials on how to setup´sendmail, but i just cant get it right

.
Any help would be great !

lmo · #2 19th May 2007, 02:10 PM

Post the output of these commands for some clues:

Code:

uname -a
hostname
cat /etc/hosts
cat /etc/sysconfig/network
/sbin/chkconfig --list | grep sendmail

whoa · #3 19th May 2007, 02:20 PM

thanks for your reply

uname -a

Code:

Linux btdig.com 2.6.19-1.2911.fc6 #1 SMP Sat Feb 10 15:16:31 EST 2007 x86_64 x86_64 x86_64 GNU/Linux

hostname

Code:

btdig.com

cat /etc/hosts

Code:

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               localhost.localdomain localhost
btdig.com       btdig.com       btdig

cat /etc/sysconfig/network

Code:

NETWORKING=yes
HOSTNAME=btdig.com

/sbin/chkconfig --list | grep sendmail

Code:

sendmail        0:av    1:av    2:pÃ¥   3:pÃ¥   4:pÃ¥   5:pÃ¥   6:av

(running swedish language pack, so av would be off and på (or 'pÃ¥') is on)

lmo · #4 19th May 2007, 04:13 PM

Look again at your /etc/hosts and then look at the man page for hosts

Quote:

For each host a single line should be present with
the following information:

IP_address canonical_hostname [aliases...]

Does it look correct? My first guess is that the man page says that the leftmost entries should be IP_adresses.

whoa · #5 19th May 2007, 04:26 PM

Quote:

Originally Posted by lmo

Look again at your /etc/hosts and then look at the man page for hostsDoes it look correct? My first guess is that the man page says that the leftmost entries should be IP_adresses.

ok, ill try that. the reason why i put the domain name there was because the ip address of the server is dynamic :/

edit:
ok, changed the hosts file to

Code:

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       localhost.localdomain localhost
80.217.170.126 btdig.com        btdig

and rebooted. still same problems :/

lmo · #6 19th May 2007, 05:48 PM

For local mail, it seems to use the 127.0.0.1 line in /etc/hosts and on mine, I have it *analogous to

Code:

127.0.0.1   btdig.com    localhost.localdomain localhost

And I can type a mail message to root

Code:

mail root
Subject: Hi root
Bla bla bla
.

and then read it with

Code:

mail -u root

Of course, that is just local mail.
By *analogous, I mean instead of btdig.com, on my system it is my hostname.
I don't know whether this would impact mail other than local mail or not.
And just because it works for me, it doesn't mean that it is correct.

whoa · #7 19th May 2007, 06:09 PM

thanks for your help once again!
i tried changing the hosts file to what you suggested, but unfortunately i still got the same problem

.
local mail works fine though.