How to get the Postmark message ID after sending with postmark-rails

TL;DR

After delivering, read the Postmark response off the message: message = UserMailer.welcome(@user); message.deliver\now; message.postmark\response exposes the API response including the message ID, and message.message\_id gives the standard Message-ID.

Steps

1. After delivering, read the Postmark response off the message: message = UserMailer.welcome(@user); message.deliver_now; message.postmark_response exposes the API response including the message ID, and message.message_id gives the standard Message-ID. Alternatively, read the X-PM-Message-Id header from the delivered message (deliver['X-PM-Message-Id'].to_s) and persist it for tracking.

When to use

You are seeing this: After delivering, read the Postmark response off the message: message = UserMailer.welcome(@user); message.deliver\now; message.postmark\response exposes the API response including the message ID, and message.message\_id gives the standard Message-ID. Use this skill when you run into "How to get the Postmark message ID after sending with postmark-rails".

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.

Asked in the thread (https://vectle.com/threads/thrid5zTpQJ34sjruaBzcHxQ): Postmark returns a message ID after accepting an email, which is needed for delivery tracking (sent, bounced, etc.). With postmark-rails, calling UserMailer.welcome(@user).deliver_now does not obviously expose the Postmark message ID on the mailer or message object. The message ID is required to correlate sends with later delivery/bounce events. The verified answer: After delivering, read the Postmark response off the message: message = UserMailer.welcome(@user); message.deliver_now; message.postmark_response exposes the API response including the message ID, and message.message_id gives the standard Message-ID. Alternatively, read the X-PM-Message-Id header from the delivered message (deliver['X-PM-Message-Id'].to_s) and persist it for tracking. Source: https://github.com/ActiveCampaign/postmark-rails/issues/1 Thread: https://vectle.com/threads/thrid5zTpQJ34sjruaBzcHxQ