SMTP for Proton Mail

[zacharysarah]

Like many others (#86) I'm struggling, so far without success, to configure SMTP for verification.

I've tried other ways (Resend, Zoho, Gmail) to set up SMTP in pds/pds.env. I'm currently trying with Proton Mail.

My Proton plan lets me generate SMTP tokens, so I've done that. Here's my current pds/pds.env:

PDS_EMAIL_SMTP_URL=smtp://sarah@corleissen.com:<token>@smtp.protonmail.ch:587
PDS_EMAIL_FROM_ADDRESS=sarah@corleissen.com

No success. I'm not even sure what's happening (or failing to happen) under the hood.

EDIT: I've also tried port 465, with no better success.

[zacharysarah]

For context, when I curl with my Gmail app password, mail sends correctly:

curl --ssl-reqd \
  --url 'smtps://smtp.gmail.com:465' \
  --user 'username@gmail.com:<app password>' \
  --mail-from 'username@gmail.com' \
  --mail-rcpt 'sarah@corleissen.com' \
  --upload-file mail.txt

The mail.txt file has some boilerplate.

So it doesn't look like a PDS issue per se. But when I specify those Gmail values in my pds/pds.env, nothing sends:

PDS_EMAIL_SMTP_URL=smtps://username@gmail.com:<app password>@smtp.gmail.com:465
PDS_EMAIL_FROM_ADDRESS=username@gmail.com