Rails 7 ActionMailer Not Sending Emails When Using Custom Delivery Method
This might be a silly question, but I'm confused about I'm experiencing an issue where my Rails 7 application fails to send emails using a custom delivery method in ActionMailer..... I have defined a custom delivery method that interacts with an external API for email delivery, but whenever I try to use it, I get the following error: `Net::OpenTimeout: execution expired`. This happens regardless of whether I call it from a background job or directly from a controller action. Here’s a snippet of my mailer setup: ```ruby class UserMailer < ApplicationMailer def welcome_email(user) @user = user mail(to: @user.email, subject: 'Welcome to My Awesome Site') end end ``` My custom delivery method is defined like this: ```ruby class CustomDeliveryMethod def initialize(settings) @settings = settings end def deliver!(mail) # Logic to interact with external API response = Net::HTTP.post_form(URI.parse(@settings[:api_url]), { email: mail.to, subject: mail.subject, body: mail.body }) raise 'Email delivery failed' unless response.is_a?(Net::HTTPSuccess) end end ``` In my environment configuration, I set up ActionMailer to use this custom delivery method: ```ruby # config/environments/production.rb config.action_mailer.delivery_method = CustomDeliveryMethod config.action_mailer.custom_delivery_method_settings = { api_url: 'https://api.emailservice.com/send' } ``` I've tried enabling debugging in my mailer by adding `config.action_mailer.logger = Logger.new(STDOUT)` to see if there’s any more detailed output, but it doesn’t provide additional context on the failure. Additionally, I confirmed that the API URL is correct and accessible. I can hit the API manually using `curl`, and it works fine, so I suspect it might be something in the way the delivery method is implemented or how the request is being made. Has anyone else encountered a similar issue or have suggestions on how to debug this problem further? I'm developing on Linux with Ruby. I'd love to hear your thoughts on this. Any advice would be much appreciated.