Commit Graph

47 Commits

Author SHA1 Message Date
Joshua Tauberer d510c8ae2a Enable and recommend port 465 for mail submission instead of port 587 (fixes #1849)
Port 465 with "implicit" (i.e. always-on) TLS is a more secure approach than port 587 with explicit (i.e. optional and only on with STARTTLS). Although we reject credentials on port 587 without STARTTLS, by that point credentials have already been sent.
2021-05-15 16:42:14 -04:00
Joshua Tauberer ae3feebd80 Fix warnings reported by shellcheck
* SC2068: Double quote array expansions to avoid re-splitting elements.
* SC2186: tempfile is deprecated. Use mktemp instead.
* SC2124: Assigning an array to a string! Assign as array, or use * instead of @ to concatenate.
* SC2102: Ranges can only match single chars (mentioned due to duplicates).
* SC2005: Useless echo? Instead of 'echo $(cmd)', just use 'cmd'.
2021-05-03 19:25:09 -04:00
Joshua Tauberer 30885bcc8a Downgrade TLS settings for port 25, partially reverting f53b18ebb9
Port 25 now is aligned with Mozilla's "Old" recommendations at https://ssl-config.mozilla.org/#server=postfix&server-version=3.3.0&config=old&openssl-version=1.1.1.

See #1705
2020-01-20 14:52:23 -05:00
Joshua Tauberer f53b18ebb9 Upgrade TLS settings 2019-12-01 17:49:36 -05:00
Michael Kroes 91638c7fe0 Removed the postgrey option that specifies which whitelist file to use. This allows the usage of a .local verion (#1675) 2019-11-23 07:58:29 -05:00
Jeff Volkenant 24a567c3be Fix mailinabox-postgrey-whitelist cron job return code for file over 28 days
Merges #1639
2019-10-05 16:27:21 -04:00
Michael Kroes 1d6793d124 Update the Postgrey whitelist to a newer version monthly (#1611)
Automatically update the Postgrey whitelist to a newer version once a month.
2019-08-31 08:38:41 -04:00
Joshua Tauberer adddd95e38 add lmtp_destination_recipient_limit=1 to work around spampd bug, see #1523 2019-02-25 13:20:57 -05:00
Joshua Tauberer aa52f52d02 disable SMTP AUTH on port 25 to stop it accidentally being used for submission
fixes #830
2018-11-30 10:46:54 -05:00
Joshua Tauberer 3dbd6c994a update bind9 configuration 2018-10-03 14:28:43 -04:00
Joshua Tauberer 51972fd129 fix some comments 2018-10-03 13:00:15 -04:00
Christopher A. DeFlumeri d96613b8fe minimal changeset to get things working on 18.04
@joshdata squashed pull request #1398, removed some comments, and added these notes:

* The old init.d script for the management daemon is replaced with a systemd service.
* A systemd service configuration is added to configure permissions for munin on startup.
* nginx SSL settings are updated because nginx's options and defaults have changed, and we now enable http2.
* Automatic SSHFP record generation is updated to know that 22 is the default SSH daemon port, since it is no longer explicit in sshd_config.
* The dovecot-lucene package is dropped because the Mail-in-a-Box PPA where we built the package has not been updated for Ubuntu 18.04.
* The stock postgrey package is installed instead of the one from our PPA (which we no longer support), which loses the automatic whitelisting of DNSWL.org-whitelisted senders.
* Drop memcached and the status check for memcached, which we used to use with ownCloud long ago but are no longer installing.
* Other minor changes.
2018-10-03 13:00:06 -04:00
Tristan Hill 4b07a6aa8f disable nested checker checks (#972)
fixes #967
2016-10-18 14:15:33 -04:00
Joshua Tauberer 5f5f00af4a for DANE, the smtp_tls_mandatory_protocols setting seems like it also needs to be set (unlike the cipher settings, this isn't documented to be in addition to the non-mandatory setting) 2016-06-12 09:11:55 -04:00
Joshua Tauberer 6b73bb5d80 outbound SMTP connections should use the same TLS settings as inbound: drop SSLv2, SSLv3, anonymous ciphers, RC4 2016-06-12 09:11:54 -04:00
Joshua Tauberer 3055f9a79c drop SSLv3, RC4 ciphers from SMTP port 25
Per http://googleappsupdates.blogspot.ro/2016/05/disabling-support-for-sslv3-and-rc4-for.html, Google is about to do the same.

fixes #611
2016-06-12 09:11:50 -04:00
Joshua Tauberer 87d3f2641d merge #685 - tweak postfix mail queue/warn/bounce times 2016-02-15 18:44:56 -05:00
Joshua Tauberer c6c75c5a17 document the default values for delay_warning_time, maximal_queue_lifetime, bounce_queue_lifetime 2016-02-15 18:38:55 -05:00
Joshua Tauberer 77937df955 bind postfix to the right network interface when sending outbound mail so that SPF checks on the receiving end will pass
fixes #3 (again)
2016-02-01 12:36:52 -05:00
dofl 85a9a1608c Update mail-postfix.sh 2016-01-21 16:05:43 +01:00
dofl 2e693f7011 Update mail-postfix.sh
Updated according to Josh's latest reaction. Sounds good.
2016-01-21 08:38:39 +01:00
dofl 6f0220da4b Update mail-postfix.sh
Same result as maximal_queue_lifetime and bounce_queue_lifetime, but complies with rfc2821.
2016-01-20 15:34:22 +01:00
dofl 09a45b4397 Update mail-postfix.sh
The default timeout for Postfix's maximal_queue_lifetime and bounce_queue_lifetime is 5 days. This is way too long if you expect someone to have an answer and after 5 days you'll get the message that it's not delivered. This disrupts communication. It would be more responsive if the user got the 'can't deliver' error after 24 hours.
2016-01-20 13:25:41 +01:00
Joshua Tauberer 73fbcd7fa3 silence all of the installing/already installed package messages on installation
Querying dpkg for each package is slow, and we have way too much output on installation because of it.
2015-08-19 15:58:35 -04:00
PortableTech 07beef3db2 outgoing_mail_header_filters use local hostname and ip
Modify outgoing_mail_header_filters and mail-postfix.sh
files to result in the primary hostname, and the public
ip of the server showing in the first mail header route
instead of unknown and 127.0.0.1.  This could help lower
the spam score of mail sent from your server to some
public mail services.
2015-07-02 16:04:56 -04:00
Joshua Tauberer 13958ba4df Merge pull request #427 from pichak/add-sender-login-mismatch
Reject outgoing mail if MAIL FROM (envelope sender) does not match login name or is not an alias that directs mail (directly) to login name.
2015-06-24 18:03:03 -04:00
Morteza Milani fc03ce9b2f Fix login map. Now includes both emails and aliases 2015-06-20 03:27:18 -07:00
Joshua Tauberer e4caed9277 add a note in the setup script about the use of our postgrey fork and dnswl's license terms 2015-06-03 16:28:20 -04:00
Morteza Milani cf904a05cc Reject outgoing mail if FROM does not match Login 2015-06-01 21:26:01 -07:00
Joshua Tauberer 980626aa40 Merge branch 'postgrey/delay/clean' of https://github.com/Xoib/mailinabox
Closes #413.
2015-05-29 13:00:51 +00:00
Xoib 11546b97bb softer the greylisting delay restriction
A lot of legit mail servers try again between 200 and 285 seconds, then
3 hours later. Why? RFC is not strict about retry timer so postfix and
other MTA have their own intervals. To fix the problem of receiving
these e-mail really latter, I reduced the delay of postgrey to
180 seconds (default is 300 seconds).
2015-05-26 16:10:14 +02:00
Joshua Tauberer eb5e8fe388 the switch of smtpd_tls_security_level may to encrypt for submission broke smtpd_tls_protocols
The submission port began offering SSLv3.

With `encrypt`, the smtpd_tls_protocols option is ignored and smtpd_tls_mandatory_protocols must be set instead.

see e39b777abc
2015-05-20 22:27:11 +00:00
Joshua Tauberer e39b777abc require TLS on SMTP submission (port 587) to prevent accidental client misconfiguration, although this has no other practical consequences since without TLS clients couldn't authenticate anyway 2015-05-06 00:25:03 +00:00
Joshua Tauberer 7ca42489ae drop legacy, export-grade, and anonymous ciphers from SMTP (port 25, opportunistic)
Even though SMTP (on port 25) is typically opportunistic and a MitM attack can't be prevented, we may as well only offer ciphers that provide some level of security. If a client is so old or misconfigured that it doesn't support newer ciphers, it should hopefully fall back to a non-TLS connection.

Postfix's default was basically anything goes (anonymous and 40-bit ciphers!). Google's MTA's only offer ciphers at 112 bits at greater, and this change approximates that with Postfix's "medium" setting.

Fixes #371
2015-05-05 23:50:07 +00:00
Joshua Tauberer 8c6363f792 bad ciphers were allowed in smtp submssion
This disallows aNULL and other bad ciphers in the Postfix submission server.

I missed an option in 45e93f7dcc recommended by the blog post I was reading.

Fixes #389.
2015-05-05 23:14:59 +00:00
Joshua Tauberer dcd971d079 the opendmarc miter should run on incoming mail only
I added OpenDMARC's milter in fba4d4702e. But this started
setting Authentication-Results headers on outbound mail with failures. Not sure why it
fails at that point, but it shouldn't be set at all. The failure might cause recipients
to junk the mail. See #358.

This commit removes the milter from the SMTP submission (port 587) listener.
2015-03-21 16:14:01 +00:00
Joshua Tauberer c4e4805160 ensure postfix/postgrey agree on whether to communicate with ipv4 or ipv6
see https://discourse.mailinabox.email/t/postgrey-and-ipv6/227
2015-01-02 23:37:16 +00:00
Joshua Tauberer 6585384daa bring the max outgoing mail size via webmail and z-push in line with the limit set in postfix: 128 MB
The limit was previously the nginx default (2MB?).

fixes #236
2014-10-16 22:11:10 +00:00
Joshua Tauberer 0b5bf602aa various improvements in bash comments 2014-10-15 11:46:20 -04:00
Joshua Tauberer 5fd107cae5 more work on making the bash scripts readable 2014-10-04 17:57:26 -04:00
Joshua Tauberer 39bca053ed add 2048 bits of DH params for nginx, postfix, dovecot
nginx/postfix use a new pre-generated dh2048.pem file. dovecot generates the bits on its own.

ssllabs.com reports that TLS_DHE ciphers went from 1024 to 2048 bits as expected. The ECDHE ciphers remain at 256 bits --- no idea what that really means. (This tests nginx only. I haven't tested postfix/dovecot.)

see https://discourse.mailinabox.email/t/fips-ready-for-ssl-dhec-key-exchange/76/3
2014-09-26 22:09:22 +00:00
Joshua Tauberer 9d40a12f44 first pass at making readable documentation by parsing the bash scripts 2014-09-21 13:43:31 -04:00
Joshua Tauberer e1606df237 s/joshdata/mailinabox/ due to repo moving to the org account 2014-08-16 13:16:01 +00:00
Joshua Tauberer 64cb00b9d6 add reject_unlisted_recipient before greylisting, fixes #127 2014-08-03 00:06:54 +00:00
Joshua Tauberer b86656243f avoid mail.log warnings about untrusted certificates on outgoing mail, fixes #124 2014-08-02 15:39:47 +00:00
Joshua Tauberer 023cd12e1a hide lots of unnecessary and scary output during setup 2014-07-16 09:36:56 -04:00
Joshua Tauberer e713af5f5a refactor the mail setup scripts
As the scripts keep growing, it's time to split them up to
keep them understandable.

This splits mail.sh into mail-postfix.sh, mail-dovecot.sh,
and mail-users.sh, which has all of the user database-related
configurations shared by Dovecot and Postfix. Also from
spamassassin.sh the core sieve configuration is moved into
mail-dovecot.sh and the virtual transport setting is moved
into mail-postfix.sh.

Also revising one of the sed scripts in mail-dovecot to
not insert a new additional # at the start of a line each
time the script is run.
2014-07-10 12:49:28 +00:00