For 3 days now, I’ve been seeing these messages. If you search online, it’s usually the result of port scanning. Aug 7 14:05:15 zuul kernel: Limiting closed port RST response from 212 to 195 packets/sec Aug 7 14:05:16 zuul kernel: Limiting closed port RST response from 219 to 215 packets/sec Aug 7 14:05:17 zuul kernel: […]
kernel: Limiting closed port RST response from x to y packets/sec Read More »
It’s a muggy Friday morning, sitting outside the cafe – it’s tolerable in the shade with a slight breeze and cold iced-latte in a glass. Dogs walking past, lots of pats. It’s time to change most of my hosts from Postfix (my favorite MTA) to dma (in FreeBSD, no install required). I have previously moved
Replacing postfix with dma + auth Read More »
It’s another Saturday morning outside the coffee shop. My abundance of free time, without conferences to run, has resulted in mind shattering pondering. Case in point: In this post: FreeBSD 14.1-RELEASE Let’s use these two hosts: r730-01 – email is from root nagios03 – email is from Charlie Root What are the differences? First idea
Why are some emails from Charlie Root and others are from root? Read More »
I like Postfix. I’ve been a fan of it for over 20 years. I deployed it on every host for outgoing email. Lately, I’ve taken to using dma (DragonFly Mail Agent) as my preferred mail handler on jails and hosts which don’t need to deal with incoming mail, only outgoing mail. After first getting serious
Replacing postfix with dma Read More »
This is based on a series of tweets which I now want to place into blog post. When I go searching for something I’ve done before, I usually check my blog first. dma is “is a small Mail Transport Agent (MTA), designed for home and office use. It accepts mails from locally installed Mail User
How I configure dma for mail delivery in jails on my internet hosts Read More »
This started off as a migration. It went down a rabbit hole of incorrect and undeclared dependencies. I’m going to post this as documentation for the required ports update. I’m migrating from Mailman 2.1 to Mailman 3 not because I want to but because Python 2.7 is deprecated. I’m sick of seeing these monitoring messages:
Missing dependencies from mail/mailman3 Read More »
I am moving my existing IMAP services to a third-party, specifically FastMail. I started this process back in March 2017 when I signed up with FastMail. I did a mail migration then, but never proceeded. At present I am hosting my own IMAP server, via Dovecot, RoundCube, and Postfix, running in a FreeBSD jail. I
Moving your IMAP server to a third party: FastMail Read More »
I have used Dovecot as my IMAP server since 2007. It has always been reliable and useful. Recently, I wanted to move my IMAP server to one host to another. I am the only user on this IMAP server. Wait, not I’m not, there are some test accounts on here, mostly used to verify that
Setting up a new Dovecot server on FreeBSD with an OSX mail.app client Read More »
Let’s Encrypt is an easy way to get free SSL certificates in an automated manner. You may never have to manually do another cert renewal again. Last night, I received this email: From: Cron Daemon To: dan@langille.org Subject: Cron /usr/local/bin/cert-puller Date: Fri, 23 Feb 2018 23:57:00 +0000 (UTC) /etc/rc.conf: 3: not found /etc/rc.conf: yr: not
Postfix suddenly starts rejecting email it had been accepting Read More »
The solution Here is the solution. You can stop reading now: ./check_email_delivery –smtp-server smtp.example.org –mailto dan@example.org \ –mailfrom dan@example.org \ –body ‘test, please ignore’ –imapssl \ –imap-server imap.example.org –username deltest –password secret That will test both delivery and receipt. There. Be gone. You don’t need the rest of this article. Thanks. Background As pointed out,
Testing email delivery Read More »