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Getting Mailhog running on a dev server (nginx, letsencrypt, ssl, ubuntu)

Get it running as a service

wget https://github.com/mailhog/MailHog/releases/download/v1.0.0/MailHog_linux_amd64

mv MailHog_linux_amd64 mailhog

chmod +x mailhog

sudo vi /etc/systemd/system/mailhog.service

[Unit]
Description=MailHog service

[Service]
ExecStart=/usr/local/bin/mailhog

[Install]
WantedBy=multi-user.target

esc :wq

sudo systemctl start mailhog

sudo systemctl enable mailhog

We've got it installed on the server, set up as a service and registered to start with the system

Add it to nginx

sudo vi /etc/nginx/sites-available/default

server {
        server_name mail.your.domain;
        listen 80;
        listen [::]:80;

        location / {
                proxy_pass      http://localhost:8025;
                proxy_set_header    Host             $host;
                proxy_set_header    X-Real-IP        $remote_addr;
                proxy_set_header    X-Forwarded-For  $proxy_add_x_forwarded_for;
                proxy_set_header    X-Client-Verify  SUCCESS;
                proxy_set_header    X-Client-DN      $ssl_client_s_dn;
                proxy_set_header    X-SSL-Subject    $ssl_client_s_dn;
                proxy_set_header    X-SSL-Issuer     $ssl_client_i_dn;
                proxy_read_timeout 1800;
                proxy_connect_timeout 1800;
                chunked_transfer_encoding on;
                proxy_set_header X-NginX-Proxy true;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                proxy_http_version 1.1;
                proxy_redirect off;
                proxy_buffering off;
        }
}

sudo nginx -t

sudo service nginx reload

sudo certbot --nginx

Install postfix(or your more favorite sendmail client) if it's not already installed

sudo apt-get install postfix

choose the smarthost option

localhost:1025 is the smtp server you want to point to

Update your php-fpm config (optional)

sudo vi /etc/php/7.2/fpm/php.ini

type /sendmail_path

sendmail_path = /usr/sbin/sendmail -t -i

esc :wq

sudo service php7.2-fpm restart

send a test email in php, see it show up in mailhog on the domain you set up

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