CentOS 5 Server :: Sendmail Broken After 5.3 Upgrade?
Apr 9, 2009
After upgrading to CentOS 5.3 my sendmail will no longer deliver messages using a program in my /etc/smrsh. It fails with the message "unknown mailer error 1". This program was working perfectly before I did the upgrade using yum. Here is the list of packages that were upgraded. Does anything jump out as being the source of the issue? I don't believe that sendmail itself was upgraded:
Packages Installed:
dbus-libs - 1.1.2-12.el5.x86_64
libselinux-utils - 1.33.4-5.1.el5.x86_64
Packages Updated:
initscripts - 8.45.25-1.el5.centos.x86_64
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Sep 15, 2010
I'm working with a vendor on getting a web site certified for Payment Card Industry Data Security Standard for processing our credit card transactions. The vendor's running Centos 5 (which we also run at my business). The current issue has to do with sendmail, which the required PCI security scans say should be upgraded to 8.14.4. However, the vendor points out that latest version packaged for yum on Centos 5 is 8.13.8.
I'm still somewhat of a newbie at this, but from my reading, it seems that installing the 8.14.4 sendmail means using 3rd party repositories and potentially breaking the system. I browsed through "Installing RPMforge" on Centos wiki, which notes that a complete listing of the over 4000 RPMforge packages is at [URL]. Scanning that link shows sendmail packages with lower numbers than what's currently installed, 8.13.8. All I see on sendmail.org are tarballs of the latest verson, 8.14.4, available 2009-12-30. I presume this means you must install from source; I'm not sure the vendor's comfortable with this, especially for such an essential service.
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May 20, 2010
I have a number of CentOS 5.4 machines that use kerberos to authenticate. This works fine. However, after upgrading one of them to CentOS 5.5 it is no longer possible to log in.
In 5.4, I get this in the log:
> called to authenticate 'hans', realm 'MYREALM'
> authenticating 'hans@MYREALM'
> not using an entered password for 'hans', allowing libkrb5 to prompt for more
> authenticating 'hans@MYREALM' to 'krbtgt/MYREALM@MYREALM'
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Note the absence of the line where libkrb5 asks for a password. Running "kinit hans" on the machine (as root, who can log in) works as it should, so I don't think anything is wrong with kerberos as such (as I did yesterday, in [URL]. Clients still running 5.4 have no problems, so the problem was introduced in 5.5.
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May 18, 2010
I had a working client installation with CentOS 5.4, using kerberos and PAM to authenticate. After an upgrade to 5.5, logins for users are no longer possible. Instead I get this:
/var/log/messages: gdm: Couldn't set acct. mgmt for <user> /var/log/secure: gdm: pam_krb5: authentication fails for '<user>': (<user@domain>): Authentication failure (Cannot read password) gdm: pam_krb5: account checks fail for '<user>': unknown reason -1765328254 (Cannot read password) gdm: pam:krb5: User not known to the underlying authentication module (Client not found in Kerberos database) "kinit <user>" still works as expected, and <user> has no problems logging in from other types of clients. Something kerberos-related apparently broke in CentOS 5.5,
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Apr 24, 2009
I am trying to set up a mail server on centos5 using sendmail and dovecot, and eventually spamassassin and some antivirus filter as well. I'd also like to get the proper secure auth mechanism set up at some point too. But for starters, I've been having a lot of difficulty trying to even connect to the mail server from a client computer in the local network. I installed Eudora on the client and after some tweaking in dovecot I was able to connect to the mail server, but then when I try to send an email I get a "connection refused" error, with nothing being logged on the server that I can see.
The last time I set up a mail server was Fedora Core 2, so the configuration files have changed a bit to say the least, and I can't really refer back to those to set up this new server. Does anybody know of a good step-by-step doc on getting the mail server going? I've read the man pages and other various readme's, but these really only list out the available options with no really good explanation of what needs to be done to get the mail server going. If there isn't a full write-up on how to do this, I'll put something together when I'm finished so others can use it in the future.
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Jul 18, 2009
I need to downgrade glibc due to a broken kernel after a libc6 upgrade attempt. See:[URL]..Especially with the reduced capabilities I have right now (few if any programs are working), how might I go about downgrading glibc to 2.6?
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Mar 16, 2011
I run a CentOS server and would like to put a disclaimer message on every email that is send through that sendmail server.
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Nov 18, 2010
We have moved from a Windows based SMTP server to Sendmail on Cent 5.5. We have a special application that was written to look at the "BadMail" folder on the Windows box. I am told by my developers that it is capable of monitor remote locations and they just need to know the format or extension of the badmail files.
My question is what is the default location of the badmail folder in Sendmail? This is a default install from CentOS.
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Mar 3, 2010
setup a mail server using sendmail on Redhat 5/Centos 5.
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Jan 28, 2009
I recently turned on sendmail in CentOS 5.2 and configured it to relay mail for its domain onto some other email account elsewhere. Anyway, it's kind of hit and miss, but I've got a few of these:
Jan 27 21:47:18 smhi sendmail[12176]: n0S3YLaX011994: to=<kevin@hiding.my.domain.com
>, delay=00:12:56, xdelay=00:00:03, mailer=esmtp, pri=120673, relay=mx.hiding.my.mailrelay.com
[65.87.230.26], dsn=4.0.0, stat=Deferred: 451 4.3.0 Greylisting is active,
please try again later.
I don't think I have any greylisting software installed, but it seems to be greylisting? What's up with that? And why would it be intermittent? how I turn this off?
I've previously configured sendmail on Fedora systems and CentOS 4 and haven't run into this before...
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Jun 23, 2009
I am trying to make my webserver a well respected email sender and it appears to me that using DKIM is something I need to do.
I have no experience with this and would like to know if anyone thinks there are issues that I should be aware of before going down this path.
Also, I have not been able to find any good, STEP BY STEP, documentation on how to set up DKIM with Sendmail.
I am also not sure if you need a certain network configuration for DKIM to work...this is what I am working with:
My webserver (centos 5.3, sendmail 8.13.8) sends outgoing mail and has a valid reverse DNS that matches a forward DNS. The MX records for my webserver's domain point to a third party email provider who handles the incoming mail for that domain. I added an spf record that signifies it that my webserver is authorized to send mail for mydomain.
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Aug 5, 2009
I have been trying to get procmail working on CentOS 5.2. I don't need anything fancy, just an auto reply for a "noreply@" account. Looking at the sendmail configuration, it appears procmail is the MDA. I have looked at many different tutorials and how-tos, but most are old, and/or the locations/paths and setups are markedly different from the defaults on my system. Can anyone recommend a good CentOS-based tutorial on Procmail w/ recipes? (I have an RHEL book and it's no help either.) Thank you for your time and consideration.
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Nov 12, 2009
We have CentOS 5.3 and are using sendmail for outbound emails. We are trying to switch over to authsmtp service. Authsmtp requires sendmail built with SASL suport.
How do I find out if my sendmail has been built with SASL support? If it is not, is it easy to build it with SASL support?
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Dec 23, 2009
I am using CentOS and sending mail through php mail function. It is taking too much time to send a mail.
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Apr 2, 2010
Sendmail does not work anymore.
//deinstaled everything
[root@localhost ~]# top -b -n1 | mail -s 'Process snapshot' mymail@mymail.net
/usr/sbin/sendmail: No such file or directory
//reinstaled everything, restart sendmail
[root@localhost ~]# top -b -n1 | mail -s 'Process snapshot' mymail@mymail.net
[root@localhost ~]# /etc/mail/submit.cf: line 544: fileclass: cannot open '/etc/mail/trusted-users': World writable directory
//fixed that with '-o' in /etc/mail/submit.cf, restart sendmail
[root@localhost ~]# top -b -n1 | mail -s 'Process snapshot' mymail@mymail.net
// in mail.log:
Apr 2 12:49:16 localhost sendmail[6252]: o32AnGis006252: to=mymail@mymail.net
, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=49856, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection refused by [127.0.0.1]
//test
[root@localhost ~]# telnet localhost 25
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused
//commented out #O DaemonPortOptions=Port=smtp,Addr=127.0.0.1, Name=MTA
//in sendmail.cf, restart sendmail
//test
[root@localhost ~]# telnet localhost 25
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused
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Sep 22, 2011
todo: I have now running sendmail with milters and auth, dovecot as lda configured with virtual domains / Local User, srs. on centos 5.x
I want to migrate to Postfix with:
at first step the same Local User now with Mbox and there Mails
same milter with macros for auth....
dovecot as lda
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Aug 4, 2011
currently i want to configure sendmail port number 25 im using these port numberalready how can i chage my senmdail port no.
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Feb 22, 2009
I have this server that runs Tomcat . this server sends mail with localhost as MTAthe local MTA is sendmail (with the default settings) . from time to time i have this strange thing and the emails it sends never reach the destination. the log shows it left the server , but looking at the logi see that the time on the log is wrong . sometime its correct and ometines its +2 hours. i guess this email are bounced at the destinationfor sending at future time . all this email that didnt reach the destination have this in common
Feb 22 15:47:44 BE00 sendmail[12969]: n1MDlikZ012969: from=<support@example.com>, size=5912, class=0, nrcpts=1,
msgid=<5269969.391235310464949.JavaMail.tomcat@BE00.example.com>, proto=ESMTP, daemon=MTA,
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Mar 18, 2009
Is anyone can help me how to setup sendmail ( Centos 5.2 ) as mail relay for Microsoft exchange. I will put the mail relay in DMZ and Mail server in Local Network.v
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Jul 23, 2009
I used Zimbra since a week ago to my centos 5 server, but now I'm using google apps. Today I tried to uninstall Zimbra and restore sendmail, but when I try to send a mail to local domain, it responds with an unknown user message and don't deliver the message to google mail.What I forgot in reconfiguration?
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Nov 5, 2009
Is there a simple way to move the Sendmail queue folder? Presently it's at the default location on /var/spool/mqueue/ but when / recently ran out of space (my fault storing backups there), it was unable to receive any more mail. There is plenty of space at another partition. My /var/opt/scalix location lives on another set of discs with lots of room. I created a folder called /var/opt/scalix/sendmail/mailqueue/ but uncertain how to move the existing queue to it.
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Dec 29, 2009
I have setup CentOS 5.2 with Nagios to monitor my network and have that configuration almost done. I have also setup Sendmail to forward all mail (really only Nagios notifications) out to my Exchange server using define('SMART_HOST', 'exchange.domain') in the sendmail configuration file and it seems to be working correctly.is there a way to configure Sendmail to forward all mail out through my Exchange server as it is now but send mail out to the internet itself if the exchange server is unavailable, somewhat like a failover configuration.
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Jun 6, 2009
how do I decipher the following entries from sendmail log:ruleset=check_relay, arg1=[120.2.197.187], arg2=127.0.0.11, relay=[120.2.197.187], reject=553 5.3.0 Rejected - your IP is blacklisted by http://www.spamhaus.org: 1 Time(s)
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Jul 31, 2009
i currently installed centos 5.3 with postfix. My old server is centos 4.5 final / new 5.3 final. Old server has sendmail / new has postfix. how can i transfer all the mail and settings from the old to the new? also, the old mail server is mail.xxx.xxx and for testing purposes i named the new mail server mail2.xxx.xxx.
when i an ready to put it into production, the new server will need to be mail.xxx.xxx and the old removed from the system. How do i go about changing the name and making sure everything comes out correct?
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Oct 9, 2009
this is sasidhar. we are getting problems with sendmail. we have a site, when user registers we are sending a confirmation mail to user. The problem is some times it is not sending mails to users. The user accounts are valid.This is what I am getting reply to my mail
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Nov 27, 2009
I'm confused about the sendmail/ssl combination. so confused, i'm not even sure what i'm confused about :) I want to have email sent from our server to the rest of the world in a 'secure' manner. Just dl'ed and installed CentOS5.4: Linux rh5 2.6.18-164.el5xen #1 SMP Thu Sep 3 04:03:03 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux the /etc/mail/sendmail.mc has the instructions
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Oct 25, 2010
I have a lightweight admin background, but good enough to set up most servers. I have switched from sendmail to postfix for the first time, but I keep going around in circles on the following...
In sendmail, I used to maintain a table (mailertable) where I would redirect email like this
Quote:
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Dec 18, 2010
I'm trying to setup sendmail to use my gamil account as a mail relay but with no success. I followed these guides: [URL]and many others.my machine is a centos 5.5 vm running under opensuse host. ( I hope that its not just a virtualbox problem..)
I ended up with this setup:
/etc/mail/auth/client-info:
AuthInfo:smtp.gmail.com �U:root� �I:xxxxxx� �P:xxxxxx� "M:PLAIN LOGIN"
AuthInfo:smtp.gmail.com:587 �U:root� �I:xxxxxx� �P:xxxxxx� "M:PLAIN LOGIN"
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Jan 24, 2011
apache2: Syntax error on line 204 of /etc/apache2/apache2.conf: Syntax error on line 1 of /etc/apache2/mods-enabled/php5.load: Cannot load /usr/lib/apache2/modules/libphp5.so into server: /usr/lib/libxml2.so.2: undefined symbol: gzopen64 Have been running ubuntu server for about 6 months on a rickety but reliable AMD1.2GHz laptop (hp compaq nx9005) Had successfully deployed a UPS and various CGI scripts. Familiar with the basics of apache tomcat and even dabbled with some mods. All was running sweetly until I performed an upgraded yesterday which took me to Kernel (from uname -a) 2.6.31-22-generic-pae #70-Ubuntu SMP Thu Dec 2 00:54:52 UTC 2010 i686 GNU/Linux
During the upgrade there were libraries which apache2 depended upon and the process halted. Have brute forced some other libraries - given there were 87 packages in the upgrade and it had got to 78 - I did not dare roll back - so pursued further until I finally noticed the message above
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Aug 5, 2010
how to setup sendmail ( Centos 5.2 ) as mail relay for Microsoft exchange. I will put the mail relay in DMZ and Mail server in Local Network.
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