Hack and / - Take Mutt for a Walk
Mutt is my favorite e-mail client and the one I use every day both professionally and personally. The greatest yet most challenging thing about mutt is how incredibly configurable it is. As you use a program, you might think “I wish it did X, Y or Z”, but in the case of mutt, most of the major settings you want to tweak are available for you to change. If you have used mutt for many years like I have, you find that you go through a few phases with your .muttrc (the main configuration file for mutt). When you start using mutt, you spend a lot of time just trying to figure out how to set up mutt to read your mail (usually with the help of someone else's .muttrc). After you get mutt working, the next phase involves tweaking more and more sophisticated options, such as folder hooks. Eventually though, your .muttrc is finely tuned just the way you like it, and you change it only rarely. These days, I usually change my .muttrc only to add a new mailbox.
What I realize is that no matter how great I might think mutt is, if someone else wants to give it a try for the first time, the learning curve is a bit intimidating. In past columns I've discussed advanced settings for mutt, but in this column, my goal is to walk you through the one thing that intimidates mutt users the most when they start out: mutt configuration. Hopefully, by the end of the column you will have a basic, functional mutt configuration you can use to check your e-mail.
These days, mutt should be available as a package for just about any major distribution, so I'm not going to cover how to install it—just use your package manager. If you are used to a regular, graphical e-mail client, two main things are different about mutt. For one, it is designed to run completely from a terminal controlled by your keyboard. Second, mutt is strictly a Mail User Agent (MUA) and not a Mail Transfer Agent (MTA). Most graphical e-mail clients not only can access and read your e-mail as a MUA, but they also know how to be an MTA (they can communicate with a mail server directly via SMTP to send out e-mail). Unlike those clients, mutt is strictly concerned with accessing and reading your mail, and it relies on a separate MTA. This means if your Linux system doesn't already have a mail server configured, you will need to set up a basic one. If you need some tips on how to do that, check out my “Make a Local Mutt Mail Server” column in the February 2010 issue.
Although you certainly can set up your mutt configuration any way you want (as long as the core config is in ~/.muttrc), because you are doing this for the first time, you might as well set up a system of configuration files instead of one giant .muttrc. Because mutt allows you to reference other configuration files from within the .muttrc, many mutt users organize their options into different files. What I like to do is separate the configuration into different categories stored under ~/.mutt. I also store my .muttrc file there with the ~/.muttrc file symlinked to it. Finally, I create a ~/.muttrc.local file that I use to store any options I want to keep local to this machine. These are options like whether to access a remote IMAP server versus a local maildir, or other such local settings. Now this may seem like a lot of work, but the point is that once you get your mutt configuration how you want it, you simply can rsync the ~/.mutt directory to the rest of your machines without wiping out any local settings.
I realize that no sample mutt config is going to please everyone, but here are some basic settings that I think should get you off to the right start. I've added comments to options where I feel they need extra explanation, but plenty of options are uncommented, so if you are curious about what an option does, the best resource is the official mutt documentation at mutt.org. Every now and then I find myself browsing through the documentation there just to look for some new (or new to me) options that I didn't know I couldn't live without.
First, let's look at my main ~/.mutt/.muttrc file. Remember that I actually create a symlink from this file to ~/.muttrc with:
ln -s ~/.mutt/.muttrc ~/.muttrc
Also, it may go without saying, but you need to create the ~/.mutt directory as well. Listing 1 shows a basic starter ~/.mutt/.muttrc.
Listing 1. Starter ~/.mutt/.muttrc
# Various client settings set query_command="lbdbq %s" set copy set beep_new set ascii_chars=yes set reverse_name set move=no unset mark_old set forward_quote set include set fast_reply="yes" set indent_str="> " # Cache email headers and store them in .muttheaders/ set header_cache="~/.muttheaders/" # All the emails mutt should consider as being from me. # In this example, firstname.lastname@example.org and email@example.com are set. set alternates=((foo|bar)@example.org) ignore * # this means "ignore all headers by default" # I do want to see these fields, though~ unignore date from subject to cc # local settings source ~/.muttrc.local # Color settings source ~/.mutt/colors # Where to store email aliases for people I email set alias_file=~/.mutt/aliases source ~/.mutt/aliases # My list of mailboxes source ~/.mutt/mailboxes #mailing lists subscribe firstname.lastname@example.org subscribe email@example.com # PGP/GPG settings # If you don't have PGP set up, comment out these lines set pgp_replyencrypt # encrypt any replies to encrypted messages set pgp_replysignencrypted # automatically sign any messages # I encrypt set pgp_show_unusable=no # don't offer revoked keys in the # PGP key selection menu # Folder hooks and other hook settings source ~/.mutt/hooks ################################### # Random and Weird Settings # ################################### # Editor Settings # Use vim as the default editor with some special options for mutt # such as spell check and 75 characters to a line set editor="vim -c 'set nohlsearch noshowmatch modelines=0 tw=75 ↪et noai spell'" # Show 7 lines of other email from a mailbox when reading # a specific email. Makes it easier to see where you are # in your mailbox when reading a message set pager_index_lines=7 # Keyboard Macros macro index h "c?\t" # show the "folder view" when # I hit 'h' # extra weird settings # this setting will highlight links and follow them # using w3m when I hit ctrl b macro pager \cb \ <enter-command>'set pipe_decode'<enter>\ <pipe-entry>'w3m'<enter>\ <enter-command>'unset pipe_decode'<enter> \ 'Follow links in w3m' auto_view text/html application/msword #printer settings set print_command="a2ps -g -Email -d -1 -M letter -R" # abook settings # abook is a cool command-line address book program # that works with mutt set query_command="abook --mutt-query '%s'" macro index \ca !abook\n macro pager A |'abook --add-email'\n
As you can see, this muttrc file is quite involved. Besides the rather large list of options I defined, I also have included separate configuration files with the source option. For instance, I have separated out all my mutt color configuration into ~/.mutt/colors. Listing 2 shows a good sample ~/.mutt/colors file you can use to get started.
Kyle Rankin is VP of engineering operations at Final, Inc., the author of many books including Linux Hardening in Hostile Networks, DevOps Troubleshooting and The Official Ubuntu Server Book, and a columnist for Linux Journal. Follow him @kylerankin
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