If you simply want to make a mailbox receive mail for another address, just add the full address to /etc/postfix/virtual: [root@srv-2 postfix]# cat virtual usr-1@networking.com usr usr-1@networking2.com usr usr-2@maildomain.com anotherusr If we simply add this line to the bottom: usr-3@maildomain.com anotherusr Mail that was was delivered previously via usr-2@maildomain.com will be delivered in the same […]

The MIME on Outlook Express seems to be broken. We have seen several instances where Outlook Express users cannot read Email sent by UNIX Email clients. The message is garbled with lots of question marks and other random characters. We have had this problem here at netadmintools.com, since we use Linux Office Suite 99 for […]

Spiderkiller is a C program that will generate unique pages with random email addresses that will confuse harvesting bots. Compile the app: srv-5:~ usr4$ gcc spiderkiller.c -o spiderkiller spiderkiller.c: In function ‘main’: spiderkiller.c:299: warning: incompatible implicit declaration of built-in function ‘strlen’ The options are simple: srv-5:~ usr4$ ./spiderkiller -help Usage: spiderkiller [-help] [-n ] [-k […]

First, we grab the source from the UW distribution link on here: [root@srv-33 src]# ls imap.tar.Z imap-utils.tar.Z [root@srv-33 src]# tar -xzf imap.tar.Z [root@srv-33 src]# ls imap-2001.BETA.SNAP-0105251616 imap.tar.Z imap-utils.tar.Z [root@srv-33 src]# mkdir imaputils (We will deal with imaputils in a different section.) [root@srv-33 src]# mv *util* imaputils mv: cannot move `imaputils’ to a subdirectory of itself, […]

One of the servers we work on is running Red Hat Enterprise Linux 3 (RHEL 3). We needed some features in the later versions of Postfix, rather than the backported version for RHEL 3. There are some RPMs available here: http://postfix.wl0.org/ftp/official/2.2/RPMS-rhel3-i386 The latest version as of the date of this article is 2.2.5-3. If you […]

First, we want to remove all the RPM stuff. A general note here. We are removing the RPMs, because we want to write all of the articles from the perspective of a generic Linux distribution as much as possible. True, we rely on the default file structure and general layout of Red Hat; however, by […]

In this article, we upgraded Postfix to 2.2.5 via RPMs; however, if a later version is needed, and you are running Red Hat Enterprise Linux Version 3 (RHEL 3), an RPM needs to be created from source. There is a source RPM for 2.2.6 available here: http://postfix.wl0.org/ftp/official/2.2/SRPMS/ To use the RPM, install it: [root@s root]# […]