E-mail and More

Status: ETA (Estimated Time of Arrival) early 2010 or sooner.

Last changed: Monday 2012-12-17 19:58 UTC

Abstract:

Right. A decent mail system is more than just the random MTA (Mail Transfer Agent). Next to an MTA at its core, a decent mail system has a pre and post processing chain and a chain that manages distribution of electronic mail. It might also have various sorts of interfaces for administrators and common users. This page is going to first look at a mail system, chatting a bit about theory, pros and cons and will finally show how to set up and manage a mail system that scales from the one-person-show environment up to some typical enterprise level environment. However, the page is not going beyond some border which is considered UIs (User Interfaces) and things like various groupware solutions that might build upon a mail system.

Table of Contents

Introduction

Components

Upgrade

Security

SPAM
Netfilter

WRITEME

I have decided to use iredmail which basically is a set of shell scripts that automates the install of things like Postfix, dovecot, clamav, etc.

http://code.google.com/p/iredmail/
http://www.iredmail.org/forum/
http://www.iredmail.org/forum/topic87-iredadmin-feature-requests-webbased-iredmail-admin-console.html
http://myamavis.kapott.org/
aptitude install mercurial bzip2 acl wget dialog mktemp
After installation has finished:
Read file iRedMail-x.y.z/iRedMail.tips first, it contains:
- User password and related sensitive information.
- Location of mail serve related software configuration files and other important information.
http://code.google.com/p/iredmail/wiki/DNS_SPF
http://code.google.com/p/iredmail/wiki/DNS_DKIM
http://code.google.com/p/iredmail/wiki/Admin_Guide
http://howtoforge.com/virtual-mail-and-ftp-hosting-with-iredmail-and-pure-ftpd
http://www.iredmail.org/forum/topic98-mailman.html
iptables
implication of not enabling acl
- as it seems, issuing mount -o remount,rw,acl / is mandatory
- http://www.iredmail.org/forum/topic97-debian-openvz-iredmail.html

- storage: Quota limit in kilobytes, 0 means unlimited. - bytes: Quota limit in bytes, 0 means unlimited. - messages: Quota limit in number of messages, 0 means unlimited. This probably isn't very useful. - backend: Quota backend-specific limit configuration. - ignore: Don't inclu

Mailbox quota: see ../tools/dovecot-quota-warning.sh
- /etc/dovecot/dovecot.conf
backup: ../tools/backup_iRedMail.sh
Advanced message Search option in webmail; example: some one search message like: subject, attachment, to, cc, bcc, flaged, domain, messege size, as like zimbra advance search
- Roundcube already has this feature, but it's not so user-friendly. You can type 'body: search_string' in search field, or 'to: user@domain.ltd' etc.
blocking extensions: .xls, .doc, .pdf, .com, .exe, .rar, .zip, etc.
- Amavisd-new has this feature, please read its document: http://www.ijs.si/software/amavisd/ Again: issue tracker is not used for tech support, please post them to our forum: http://www.iredmail.org/forum/
http://wiki.dovecot.org/PostLoginScripting
disclaimer http://www.iredmail.org/forum/topic210-faq-how-to-enable-signing-disclaimer-on-outgoing-mails.html

Introduction

Components

Upgrade

http://www.iredmail.org/forum/topic177-general-way-to-upgrade.html

Security

- testing http://www.gfi.com/emailsecuritytest/

SPAM

Domainkeys

Sender Policy Framework

Greylisting

how do you turn off greylisting?
- in /etc/policyd.conf set GREYLISTING=0 and then restart policyd
- or try to make the interval time shorter: TRIPLET_TIME=1m; 1m is 1 minute.

Netfilter

- http://www.iredmail.org/forum/topic209-faq-iredmail-opens-which-service-ports.html - how can I disable the IPTables that was shipped with iredmail on

startup?

/etc/init.d/iptables stop or
If you want do disable it on system startup, run: chkconfig --level 345 iptables off

TCP ports to open: 80,443,25,587,465,110,995,143,993,389,636,21,20

# http/https INPUT -p tcp -m multiport —dport 80,443 -j ACCEPT

# smtp/smtps INPUT -p tcp -m multiport —dport 25,587,465 -j ACCEPT

# pop3/pop3s INPUT -p tcp -m multiport —dport 110,995 -j ACCEPT

# imap/imaps INPUT -p tcp -m multiport —dport 143,993 -j ACCEPT

# ldap/ldaps INPUT -p tcp -m multiport —dport 389,636 -j ACCEPT

# ftp. INPUT -p tcp -m multiport —dport 21,20 -j ACCEPT

# ssh INPUT -p tcp —dport 22 -j ACCEPT