[原创]如何使用sendmail+procmail备份所有发出和收入的邮件？
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Disclaimer:
The author of this post takes absolutely NO responsbility for any risks and voliations involving in anyway using this post. Be warned that eavesdropping emails is a serious crime.
Please keep above disclaimer intact when posting it in other forums. Thank you!
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Making an automatic copy of all inbound emails
*Create /etc/procmailrc PMDIR=/etc/procmail
LOGFILE=/var/log/pmlog
VERBOSE=yes # Set to yes when debugging; default is no
INCLUDERC=$PMDIR/rc.localcopy
*Create directory (files) and change permission (presume sendmail is running as root)
chmod 400 /etc/procmailrc
mkdir /etc/procmail
chmod 700 /etc/procmail
chmod 600 /etc/procmail/*
touch /var/log/pmlog
chmod 600 /var/log/pmlog
*Create /etc/procmail/rc.localcopy as follow:
:0c
! [url=mailto:postmaster@mydomain.com]postmaster@mydomain.com[/url] # each messages will be forwarded to postmaster
Making an automatic copy of all outbound emails (tested in Redhat 8.0)
*Create /usr/share/sendmail-cf/cf/sendmail.mc (add the following line).
LOCAL_CONFIG
CP PROCMAIL
LOCAL_RULE_0
R$*;$: ; $1
R; $+ ;;$: $>;canonify $1 @ $2
R; $+ ;;$: ; $1 ;
R; $+ ; $#procmail $@ /etc/procmail/procsh;$: $1 ;
R; $*;$: $1
MAILER(local)dnl
MAILER(smtp)dnl
MAILER(procmail)dnl
*Replacing all ; with real TAB and ./Build sendmail.cf.
*cp /usr/share/sendmail-cf/cf/sendmail.cf /etc/mail/sendmail.cf
*/etc/init.d/sendmail restart
* Create /etc/procmail/procsh as in sendmail.cf as:
PMDIR=/etc/procmail
LOGFILE=/var/log/pmlog
VERBOSE=yes
:0
* !^To:.*@yourdomain.com # for any emails sending out (not local domain)
{
:0c:
/var/mail/outbound # make a copy
}
:0
! -f "$@" # send message back to sendmail for handling
*chmod 400 /etc/procmail/procsh
* Make sure procsh is different from /etc/procmailrc because /etc/procmailrc is system level rc file for procmail. It could be used for CC inbound emails. Don't mix them together.
NOTES: By setting sendmail to use procmail as LDA (local delivery agent) in order to make a copy of all outbound emails, this sendmail server lose the ability to receive inbound emails. So far, I have not figured out how to solve this issue in sendmail. If you have any idea, please post it to this forum.
A work around is seperating inbound & outbound email servers, such as setting up an outbound email gateway (which is not uncommon), and using the standard sendmail configuration for inbound emails. Another option is using 2 sendmail binaries in this server, one for outbound and another for inbound, but it needs to be tested.
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