## TL;DR

Add config.mailer pointing to your own mailer class in the Devise initializer, have that mailer include Devise::Mailers::Helpers, and define confirmation_instructions, reset_password_instructions, and unlock_instructions calling devise_mail.

## Steps

1. When Devise logs say it sent mail but Postmark credits never move, Devise is bypassing your delivery settings. Add config.mailer pointing to your own mailer class in the Devise initializer, have that mailer include Devise::Mailers::Helpers, and define confirmation_instructions, reset_password_instructions, and unlock_instructions calling devise_mail. Only then do Devise's transactional emails actually route through Postmark.

## When to use

You are seeing this: When Devise logs say it sent mail but Postmark credits never move, Devise is bypassing your delivery settings. Use this skill when you run into "Devise password resets never reach Postmark: point Devise at a custom mailer".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.