Protonmail Bridge for Mobile Devices
This post will go over setting up a bridge to use Protonmail with other devices that don’t have the official Protonmail Bridge available for them. The Protonmail Bridge allows you to get all the benefits of Protonmail with other mail clients.
I’m writing this because I think Protonmail’s mobile client kind of sucks and because Apple announced some pretty nice privacy features coming in i[Pad]OS 15 that I would love to take advantage of. Plus, I wouldn’t mind having one less app on my phone.
- A Linux server to host the bridge
- Docker installed on your Linux host
I’m gonna assume you have a Linux server setup that you’d like to dedicate to the bridge. I’d recommend setting up Wireguard or some sort of VPN to encrypt the connection between your client and the server and as a way to restrict access to the bridge.
Setup the Bridge:
I’m going to use hydroxide, an open source Protonmail bridge for making Protonmail accessible to my other devices.
I created a cross-architecture Docker image to simplify this process greatly for myself and others.
First, install Docker on your host:
For the rest of the post I’ll assume that the following Docker commands will be run as root or as a user who can access the Docker daemon. Alternatively, I would suggest looking into rootless Docker and running the hydroxide container as an unprivileged user. Regardless, just make sure you’re at a place where you can run
docker commands without an issue.
Now, let’s login to Protonmail with
mkdir -p ~/.config/hydroxide docker run -it --rm -v ~/.config/hydroxide:/root/.config/hydroxide heywoodlh/hydroxide auth <user>
Now run the following command to run Hydroxide’s IMAP, SMTP and CalDav instance (modify
0.0.0.0 to match whatever IP address your devices will be connecting to):
docker run --restart unless-stopped -p 1025:1025 -p 1143:1143 -p 8080:8080 -d -v ~/.config/hydroxide:/root/.config/hydroxide --name hydroxide heywoodlh/hydroxide -imap-host 0.0.0.0 -smtp-host 0.0.0.0 -carddav-host 0.0.0.0 serve
Check if your container is running:
docker logs hydroxide
Connect Your Client:
Now all you have to do is connect your app to your Hydroxide instance using the following settings:
Note on iOS:
Using an alternate port for SMTP and IMAP isn’t well documented so I wanted to throw in that I followed this post to set up Apple Mail on my iPhone and iPad with a custom port for SMTP/IMAP: