similar to: sendmail Deferred mail - reason unknown

We have an issue with some customers who refuse to accept ICMP traffic to their mail servers. It seems that they have put Mordac, preventer of information services in charge of their firewall policy (http://en.wikipedia.org/wiki/List_of_minor_characters_in_Dilbert#Mordac). My mail logs are showing that customers who specifically disallow ICMP traffic have many "Connection Reset"

Is there an easy way to configure sendmail to only send mail to addresses in one particular domain?

Hi all, I having a problem with my sendmail server running on centos 5.7 x64. Sometimes when we send an email to microsoft exchange servers, sendmail says deferred or timeout. I do not know what is happening. Here is some details; [root at avgw ~]# sendmail -v -qRxxx at xxx.gov.qa Running /var/spool/mqueue/q0B7caw9023076 (sequence 1 of 2) <xxx at xxx.gov.qa>... Connecting to

I have a virus and spam filter device that can do VRFY commands to reject invalid email before it gets to the next mail hop. How can I configure the SMTP server to only allow VRFY commands from one particular IP address, and nowhere else? I don't want spammers to be able to hammer on the gateway looking for valid addresses to send to.

I have set up entries in /etc/hosts.allow and /etc/hosts.deny as follows: /etc/hosts.allow sendmail : 10.0.0.0/255.0.0.0 sendmail : LOCAL /etc/hosts.deny sendmail : ALL When I try to connect to port 25 from an Internet host via telnet, the server still responds as usual. The only difference I see is this in my /var/log/maillog: Apr 24 15:41:49 server sendmail[20691]: m3OKfna20691: tcpwrappers

Maybe someone can help me sort this out. I want to block outbound mail from my network based upon the recipient address. Internal servers should still be allowed to send emails, but not to a few specific addresses. I've tried creating some rules in /etc/mail/access but to no avail. Is it possible to do this?

+the people I hashed this out with so many months ago I think it's a reasonable proposal, but obviously I floated it. :) Let's try to get a second opinion. Again, it's a syntax something like: define void @foo() prefix [i8* x 2] { i8* @a, i8* @b } prologue [i8 x 4] c"\xde\xad\xbe\xef" { ret void } On Thu, Aug 21, 2014 at 1:58 PM, Ben Gamari <bgamari.foss at

I'm up for a cell phone contract renewal and am considering upgrading my handset. I looked at some devices at my local AT&T store but nothing really jumped out at me. I'm particularly interested in a cell phone that has a reliable ssh client, with ssh-agent and public key authentication abilities. Those of you who administer systems remotely, what mobile ssh client do you recommend?

I have a server that is undergoing some patching soon and would like to make note of any files that have changed after the patching is complete. Can you recommend a tool that uses md5sum snapshots to do a quick before and after test, showing anything that's changed on a particular file system?

Can anyone point out reasons why it might be a bad idea to put this sort of line in your /etc/hosts file, eg, pointing the FQDN at the loopback address? 127.0.0.1 hostname.domain.com hostname localhost localhost.localdomain

We have a directory full of installation and configuration scripts that are updated on a fairly regular basis. I would like to implement some sort of version control for these files. I have used SVN and CVS in the past, but I thought I'd ask if anyone can recommend a simple, easy-to-use tool that would be better than cvs or subversion for this fairly simple setup.

I have a large (1.5TB) partition with millions of files on it. e2fsck has been running nearly 12 hours and is still on "Checking directory structure". Any tips for speeding this along? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100831/8653d551/attachment-0002.html>

What am I doing wrong here? I need to be able to write to /var/cvs. This used to work before I moved these groups into an LDAP directory instead of /etc/group: [scarolan at watcher:/var/cvs]$ touch test.txt touch: cannot touch `test.txt': Permission denied [scarolan at watcher:/var/cvs]$ ls -ld drwxrwsr-x 4 cvs cvsgrp 4096 May 18 2008 . [scarolan at watcher:/var/cvs]$ id scarolan

I have a perl script which runs from a cron job. How would you limit the amount of RAM that this script is allowed to consume? Is there a ulimit setting that will accomplish this? If so does ulimit have to be run each time the script is run, or is there a way to set it permanently?

This snippet of code pulls an array of hostnames from some log files. It has to parse around 3GB of log files, so I'm keen on making it as efficient as possible. Can you think of any way to optimize this to run faster? HOSTS=() for host in $(grep -h -o "[-\.0-9a-z][-\.0-9a-z]*.com" ${TMPDIR}/* | sort | uniq); do HOSTS+=("$host") done

Ok this is kind of a goofy question but I want to make sure I get it right. Suppose we have a 25 mb video, that is 117 seconds long. If we wish for this streaming video to play smoothly with no compression, buffering or skipping, the following bandwidth requirements must be met: 25 megabytes = 204800 kilobits. 204800 kb / 117 seconds ~ 1750kb/s Does that look right to you?

hi, I am writing an application in which i have list of books fetching from data base,i am using textbox to display that data from database .ie "xyz" hindi, are in textbox. i am displaying 100 record per page ,i want to use single save button that will save changes in all page instead of for each recors (means if i change "xyz"(name) from first line and

I have never encountered anything like this before, so thought I'd post here and see if anyone can help. We have a java application that sends out notification emails to end-users. The body of the email is some boilerplate text and HTML that is pulled from a database. When the emails are received there are random instances of " !" (that's a space and a bang symbol) inserted

I really like gnu screen and use it everyday but there's one thing that is a bit inconvenient, and that's the odd line wrapping and terminal size issues that seem to pop up. The problem crops up when I type or paste a really long command, and then go back and try to edit it; the text starts to wrap over itself and you have no idea what you are editing. Any fixes for this?

Can anyone recommend an enterprise-class monitoring system for both Linux and Windows servers? Here are my requirements: SNMP trap collection, ability to import custom MIBs isup/isdown monitoring of ports and daemons Server health monitors (CPU, Disk, Memory, etc) SLA reporting with nice graphs Pager/Email/SMS alerts with groups, filters and escalations Built-in MTBF and MTTR reporting Robust