General :: Sendmail Not Authenticating Users?
Jan 24, 2011
Can connect to our mail server using telnet onto port 25 and this works correctly, 'ehlo whatever' shows output as expected.
However using a mail client to connect it gives an authentication error and the following appears in the maillog file;
did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
what to look for in the config, this works correctly on our development box but not on our production server. Could it be another program is interfering with the connection?
Sendmail is running in standalone mode not through the xinetd daemon.
I am using the PLAIN AUTH method as to try and avoid getting more errors.
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Feb 2, 2010
I have a problem with sendmail. I am using the zen.spamhaus.org dnsbl, and it is doing a wonderful job of blocking incoming spam from open relays. But it is blocking my users who are on a dynamic ip range from any isp remotely. They should be able to authenticate and send messages no matter where they are as long as they authenticate right? I just want to use the blacklist to block incoming mail to my server that is being distributed to our email addresses.
I want to block people that are hosting mail servers and sending mail to my domain from isp sub-nets. But I don't want to block my users that are sitting on isp subnets using their mail client to authenticate over smtp and send an email from my mail servers.
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Jun 14, 2011
All of sudden a working SAMBA server not allowing to login and deny permission for users to access it shares. When I check I checked the server directory rights are same, find no changes. and smb.conf is also same. when I checked closely I found the following error.
1. smbd.log show the following messages
[2011/06/14 16:07:15, 0] lib/util_sock.c:get_peer_addr(1232)
getpeername failed. Error was Transport endpoint is not connected
[2011/06/14 16:07:15, 0] lib/util_sock.c:read_data(540)
read_data: read failure for 4 bytes to client 0.0.0.0. Error = Connection reset by peer
[2011/06/14 16:07:36, 0] lib/util_sock.c:get_peer_addr(1232)
getpeername failed. Error was Transport endpoint is not connected
[2011/06/14 16:07:36, 0] lib/util_sock.c:get_peer_addr(1232)
[Code]...
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Jul 18, 2010
I have two ubuntu 10.04 64-bit servers running samba (3.4.7) and openLDAP (2.4.21). The LDAP directory is successfully replicating between the two servers. These servers also serve as LDAP servers for sudo, pam, nss, and other services for a dozen servers without issues. The BDC samba is configured to use itself for LDAP. I connected to the BDC using the samba ldap credentials and verified I could a) see the Computer object b) read NTPassword and LMPassword. The workstations can authenticate to the domain successfully against the PDC. If a workstation boots and connects to the BDC, they login fails with:
Code:
[2010/07/18 11:46:23, 0] rpc_server/srv_netlog_nt.c:336(get_md4pw)
get_md4pw: Workstation MACHINENAME$: no account in domain
[2010/07/18 11:46:23, 0] rpc_server/srv_netlog_nt.c:584(_netr_ServerAuthenticate3)
_netr_ServerAuthenticate3: failed to get machine password for account MACHINENAME$: NT_STATUS_ACCESS_DENIED
Successful authentication against the PDC shows:
Code:
[2010/07/18 11:59:20, 1] smbd/service.c:1063(make_connection_snum)
MACHINENAME (192.168.2.145) connect to service netlogon initially as user username (uid=30000, gid=512) (pid 1727)
[2010/07/18 11:59:20, 1] smbd/service.c:1063(make_connection_snum)
MACHINENAME (192.168.2.145) connect to service data initially as user nobody (uid=65534, gid=65534) (pid 1727) .....
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Apr 22, 2009
First, I'm extremely green with linux. I'm trying to configure my CentOS 5.2 box to authenticate my SSH users with my Active Directory. What would be the best way to go about doing that? I've configured Winbind and joined it the the domain but I'm not able to login locally or SSH with an AD account. I'm not sure where to go from here. Also my users will not be accessing any file shares on this box, SSH only.
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Mar 16, 2011
How to prevent a user sending a mail to a particular user in an intranet mail server?I tried with /etc/mail/access file but could not.
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Jan 11, 2010
I am having Sendmail ver 8.13.1 installed on CentOS 4.5. Recently we have noticed that some emails are not getting delivered to user. Mailserver is receiving emails and they are getting processed but not getting delivered to user.
I have checked mail log and in the log it shows that email has been delivered to user below is log for reference
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Jul 7, 2010
I don't know what happened but sendmail suddenly stopped authenticate my users who tries to send mail.
I use slackware 13.0 and sendmail for SMTP with ssl and plain authentication. Imapd works fine.
There is nothing in logs just that the client did not issue MAIL/EXPN/VRFY/ETRN during connection.
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Jul 27, 2011
For a project that I have been assigned to, I need to send emails to a business partner(business_partner.com) from one production server. However, my emails neither reach their destination nor bounce back to me.
Working with our business partner's IT support, the following error was discovered in their maillogs:
Quote:
Further analysis by my IT support shows that emails are successfully sent out ("Message accepted for delivery"):
Quote:
The app I coded is not using a public internet email address (e.g. me@hidden_domain_name.com) to send these notifications.
Instead, it uses an intranet email address (the server's where my code resides: user_name@servername.hidden_domain_name.com).
We created an alias but it made no change. Would adding my public internet email address to "trusted-users" file (we use sendmail)
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Mar 26, 2010
I have the following problem and tried (almost) anything to fix it but without a full success.
We're running a server with CentOS 5.4. Every night a logwatch report is send. These mails are rejected by our mailserver because some invalid details. These mails are send to local user root which is redirected to another external mail address with /etc/aliases.
At first the mail was send from root@localhost.localdomain to root@localhost.localdomain. As you can imagine, our mailserver rejected this because the localhost.localdomain parts. So I changed the sendmail config with these options:
Code:
dnl EXPOSED_USER(`root')dnl
FEATURE(masquerade_envelope)
MASQUERADE_AS(`domainA.com')
MASQUERADE_DOMAIN(`localhost.localdomain')
MASQUERADE_DOMAIN(`slave02.domainA.com')
This solved my problem partially: Mail is now coming from root@domainA.com (which is OK), but is send to root@slave02.domainA.com (slave02 is the local hostname), which is not OK. I tried everything I could find to change that last part to, but nothing seems to work.
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Apr 22, 2010
I want to know is it possible in Sendmail to restrict some users from sending / receiving mail to / from outside world i.e. they should be able to send and receive mails only from local domain.
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Nov 19, 2010
I'm going crazy with this one. For whatever reason, sendmail will not authorize any users. I've tried multiple logins (all with good credentials) but still get login fail, ie (FYI this is a sendmail/MailScanner setup if it makes any difference):
220 hostname.net ESMTP Sendmail 8.13.8/8.13.8; Fri, 19 Nov 2010 12:07:08 -0600
ehlo hostname.net
250-hostname.net Hello testdomain.com [123.123.123.123], pleased to meet you
[code]....
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Apr 21, 2010
I found 2 previous posts, one from 2005 and one from 2006. The 2005 post was not very helpful and the 2006 threads are not exactly what I was expecting. So I wanted to ask the question to be sure. I have already stood up the new fedora 12 server. The old server is also fedora 12. I need to migrate local users and sendmail mailboxes. In the past couple of years the environment was small enough to create a copy of the users and then have the users mail themselves, but I want to start migrating users/mailboxes properly.
On a unix level I am a jr admin, but I have extensive senior level experience as a windows engineer and network engineer. I do feel comfortable with using the unix command line, but usually operate the unix systems thru webmin because I am not familular with more complex commands. Ideally a software solution to migrate users and/or mailboxes from one server to another is what I am looking for, but in leiu of a software solution I still need to migrate user accounts and their mailboxes. LDAP is not in place, but if the process becomes easier with LDAP I am willing to do what is needed to set up LDAP. (I have no previous experience setting up LDAP)
I do not want to change my mail server from sendmail to different software. At least right now. Both systems are up and running. They can connect to each other via public ipv4 address' only. The new server has already been installed and configured with all the software to match the old server. How do I migrate users and sendmail mailboxes from one fedora 12 server to another fedora 12 server?
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Jun 9, 2010
The problem is to make sendmail use different LDA for diferent users in the same domain. For example, deliver bob@some.domain with procmail and genry@some.domain with mail.local.
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Jan 7, 2010
how to set this up.. so far I have done the following:
Code: Step 1: Install the Required Packages
Note: Enter Y when asked if you want to install the additional packages
apt-get install krb5-user
apt-get install winbind samba
Step 2: Edit the /etc/krb5.conf File
[logging]
default = FILE10000:/var/log/krb5lib.log
[Code]....
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Oct 21, 2009
How to restrict some uses to send mail to outside domains except local in sendmail.I am using ( CentOS5 + Sendmail )
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Oct 24, 2009
Well I want my sendmail to pipe all users' incoming emails to /dev/null ... I just don't want to accept emails. Every user that exist on the system currently or will be made in future, I want their incoming emails to them to be piped to /dev/null .... I just want those users to be able to send emails.
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Oct 18, 2009
I have been following the steps mentioned at [URL] Now I want to add authentication through .htaccess.
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Apr 10, 2011
I do have a problem on updating linux ubuntu 10 I'll show you the error and my sources.list.. Error in authenticating some packages: It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again later. See below for a list of unauthenticated packages.
acpi-fakekey
acpi-support
acpi-support-base
acpid
[code]....
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Jun 15, 2011
I have bees assigned a problem which states that :
sendmail-2: Wrong number of instances of process sendmail:, expected instances equal 1 but found 0
THats it...what exactly this means and how should i proceed for solving this problem...
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Sep 5, 2010
I have installed postfix and dovecot on my server and thought postfix will not only take SMTP connection from my e-mail client like Outlook, but also handles "mailx" commands from the server. However, it looks like sendmail is still responsible for sending mails from "mailx". I tested this by turning it on/off using "service sendmail stop" and "service sendmail start". Mails sent using "mailx" will only be sent when sendmail is up. When I did "yum info sendmail", it lists sendmail as an installed package. Is is safe to remove sendmail by running "yum erase sendmail", and let postfix handles "mailx" also?
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Dec 19, 2010
How to created users in pureftpd and the users are stored in mysql database. I tried when i try to connect i got like this error authentication failed error
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Nov 1, 2010
I am using webmin for my daily tasks. I have fedora 13, whenever I click on ''Sendmail M4 Configuration'' or Outgoing Addresses (generics)'' I get the following error message
Quote:
The Sendmail M4 configuration base directory /usr/share/sendmail-cf was not found on your system, or is not the correct directory. Maybe it has not been installed (common for packaged installs of Sendmail), or the module config is incorrect. I read documentation at sendmail.org, it seems that structure of directories for send mail has been changed in version sendmail-8.1.4 shipped with FC13. In webmin config module we have
Quote:
Sendmail M4 base directory = /usr/share/sendmail-cf
which is not there. I did a locate / sendmail-cf on the command line, it finds nothing
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Jul 13, 2010
I have been trying to set up ssmtp so I can send email using Gmail's ssmtp servers. However, when I try to send mail (using mailx), I get the following message:
Code:
Can't send mail: sendmail process failed
Here's the last line from dmesg (the only one applicable, according to the timestamps and message content):
Code:
[484114.608378] sendmail[17975]: segfault at 0 ip b7dbbbf3 sp bfb0dc4c error 4 in libc-2.11.2.so[b7d44000+14e000]
Here's my ssmtp.conf:
Code:
#
# /etc/ssmtp.conf -- a config file for sSMTP sendmail.
#
[code].....
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Aug 1, 2011
i have a NIS master server and 4 NIS clients. out of 4 nis clients two are acting as login servers ie users will login and do all their stuffs and the remaining two are application servers. But sometimes users login into applications servers and started doing all their developer's job. i want to allow only a limited number of users tointo this application users not all the users who are all part of the nis domain.all the systems are running RHEL 5.4 on hp's proliant x86_64 based servers. Please advice me how should i proceed? enabling ip tables is not possible in my environment.
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Jan 18, 2010
When I have different people log into our ftp and browse to the same folder, some people see the files inside, some don't. all the user accounts are in the same group, which has permission to this folder. but the one user who can see the files is the owner. how can i fix it so everyone in that group who's the owner of the folder can see the files?
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Oct 1, 2009
Because I was browsing around in KDE and found out that I can view other users files and they can view mine.
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Mar 2, 2010
I hope this is the right place to post a Samba related question. I have 2 Windows Server 2003 machines acting up. In /var/log/messages of my fileserver (F10, Samba 3.2.11) I am logging these messages (log level = 10)
Code:
Mar 2 15:55:15 fileserver smbd[3768]: [2010/03/02 15:55:15, 0] rpc_server/srv_netlog_nt.c:_netr_ServerAuthenticate2(546)
Mar 2 15:55:15 fileserver smbd[3768]: _netr_ServerAuthenticate2: netlogon_creds_server_check failed. Rejecting auth request from client DATA-SYNC machine account DATA-SYNC$
[Code]...
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Apr 1, 2010
I recently modified sendmail.cf to use a third party SMTP server to send emails. It works great. But when I run sendmail from the command line, I have to specify the -C flag and force feed it the location of my sendmail.cf, or else it doesn't work.
So in other words, the following works great:
However, if I don't specify the -C flag, sendmail doesn't consider what's in the sendmail.cf and barfs:
I don't run sendmail as a daemon. I'm only using it to send emails. I know my modifications of sendmail.cf are correct because it works perfectly when I use the -C flag. I searched my disk to see if I could find another sendmail.cf on the machine and only the one in /etc/mail came up.
Why sendmail is not reading my sendmail.cf?
I'm running Sendmail version 8.14.2 on Fedora Core 8.
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Apr 2, 2011
I am configuring a new ubuntu nis client and have all the configuration files exactly the same as existing clients (nsswitch.conf, passwd, group, host.conf, hosts, yp.conf)
The new client returns a dump of the passwd file with a "ypcat passwd" command. ypwhich returns the correct domainname. Ypmatch seems to work as well but the client won't authenticate!
NFS is mounted and I can see home directories
The debian server is working fine with existing clients.
Could this be an issue with running updates on the new client?? could debian and ubuntu be not getting along.
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