Leaving Google

Google evolved an email service for Wildsong.biz offering to being a "suite" of tools that I don't need or want. A few months ago they announced it would be a for-pay only service. All that's fair, but I am not motivated to pay for the service.

I am setting up map46.com and w6gkd.radio domains for starters to test everything.

For now,

1. Set up new gmail accounts for each of my users. (done)
2. (On Google), forward from the existing wildsong accounts to new gmail accounts (2/3's done. Doing mine today. 1/1/23)
3. Set up email forwarder for wildsong.biz on my Tektonic VPS. (done)
4. Move devices (phones and tablets) to new addresses. (2/3 done, in the meantime I abandoned my smartphone for a Sunbeam F1 so done.)

I have a VPS at Tektonic.net as the mail server. It's on the Internet all the time even when I trip and kick the wires out of the wall here at home.

As my SMTP server I will be using Postfix, along with its friends Postgrey, SpamAssassin and ClamAV.

Google accounts

Forward mail from one gmail account to another

[/cdn-cgi/l/email-protection [email protected]] -> [/cdn-cgi/l/email-protection [email protected]]

Move mail from one gmail account to another

Google uses POP3 to transfer mail between accounts. Strangely Google does not allow Google to import mail from Google.

In the old account you have to allow "less secure" apps.

Then you have to set up POP3 in Accounts to tell the new account to do the import. It really did take 1-2 days for it to happen.

The process is not documented by Google, it's described in a community posting.

Google's process to describe transferring mail is described by a user, not by Google.

Move Google Photos

Make the new account and the old one "partners" and "share everything."

VPS set up

Hostname "hostname -f" should show the FQDN, which is w6gkd.w6gkd.radio Set FQDN in /etc/hosts

Firewall? No. I am currently running fail2ban but have no firewall as such right now, which is fine for this server. I'd need to make sure port 25 is open.

System time. It is on UTC. Change it. Install NTP.

timedatectl set-timezone America/Los_Angeles
apt install ntp
systemctl status ntp

Syslog I think it is already set up. See /var/log/mail*

DNS is at Cloudflare. "dig w6gkd.radio MX" tells me it's pointed at the right place. The names "mail", "smtp", and "imap" should be CNAMEs fpr w6gkd.w6gkd.radio

The reverse needs a PTR record in place at the ISP. I did this via a ticket with Tektonic. It now returns w6gkd.w6gkd.radio

SMTP authentication - so I can forward mail from Google (and my own servers). https://www.bluehost.com/help/article/email-client-enable-smtp-authentication

My standard TXT record for email, V=SPF1 +A +MX -ALL

Server: mail.DOMAINNAME
Port: 465 with SSL

TLS Certificate

Install and configure Postfix

Out goes Exim4, in with Postfix. I tried putting it in Docker, sigh, maybe later for that.

apt remove exim4-base exim4-config exim4-daemon-light 
apt install postfix postgrey clamav spamassassin

The Book of Postfix

Configure in /etc/postfix especially main.cf

Install and configure OpenDKIM

(It has to work with Postfix.)

apt install opendkim opendkim-tools

How does it work? https://mailtrap.io/blog/dkim/

Help with Postfix: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy

Test it with

mail [/cdn-cgi/l/email-protection [email protected]]

----------------------------------------------------------
DKIM check details:
----------------------------------------------------------
Result:         pass (matches From: [/cdn-cgi/l/email-protection [email protected]])
ID(s) verified: header.d=w6gkd.radio

Testing

To send mail on the host, I want the address to have the domain not the hostname,

date | mail bwilson

should go to [/cdn-cgi/l/email-protection [email protected]] not [/cdn-cgi/l/email-protection [email protected]]

This is controlled by "mail" NOT postfix. So put this in /etc/mailutils.conf

address {
   email-domain w6gkd.radio;
}

1. Can I send from w6gkd.radio?
2. Can I send to [/cdn-cgi/l/email-protection [email protected]]?
3. Are the letsencrypt keys working?

/etc/cron.weekly runs /usr/local/sbin/renew_certs.sh

See /etc/letsencrypt/live to see what is set up

Filters

• Postgrey -- https://postgrey.schweikert.ch/
• Spamassassin -- https://spamassassin.apache.org/
• ClamAV -- Antivirus / malware -- https://www.clamav.net/

IMAP - Dovecot

I am inclined to install dovecot, mysql, and elastic search in Docker containers Docker based installations are so clean and flexible.