Emails not sending in Heroku using Postmark - ruby-on-rails

Question

When on Heroku my custom mailer does not send, I get no errors at all. This is the log -
Spree::HmsCommunicator#progress_email: processed outbound mail in 5.5ms
=> nil
It works perfectly fine in development -
Spree::HmsCommunicator#progress_email: processed outbound mail in 1178.4ms
Sent mail to blah#thehandbagspa.com (983.0ms)
Date: Tue, 19 Jan 2016 08:30:54 +0000
From: blah#thehandbagspa.com
To: blah#thehandbagspa.com
Message-ID: <569df43e70279_fe9a3ff1ae06020465535#Andrews-MacBook-Pro.local.mail>
Subject: Handbag Update | The Handbag Spa
Mime-Version: 1.0
Content-Type: multipart/alternative;
boundary="--==_mimepart_569df43e6d9de_fe9a3ff1ae0602046541e";
charset=UTF-8
Content-Transfer-Encoding: 7bit
track-opens: true
application.rb -
config.action_mailer.raise_delivery_errors = true
config.action_mailer.delivery_method = :postmark
config.action_mailer.perform_deliveries = true
config.action_mailer.postmark_settings = { :api_token => "***...." }
hms_communicator.rb -
module Spree
class HmsCommunicator < BaseMailer
require 'twilio-ruby'
def progress_email(handbag, stage, movedTo)
#handbag = handbag
#stage = stage
#movedTo = movedTo
mail(:subject => 'Handbag Update | The Handbag Spa',
:to => #handbag.user.email,
:from => 'blah#thehandbagspa.com',
:track_opens => 'true')
#send_text_message
end
def test_email
mail(:subject => 'Handbag Update | The Handbag Spa',
:to => 'blah#thehandbagspa.com',
:from => 'blah#thehandbagspa.com',
:body => 'hey',
:track_opens => 'true')
end
def send_text_message
account_sid = '****...'
auth_token = '****...'
alphanumeric_id = "TheHandbagS"
twilio_phone_number = '+..'
recipient_phone_number = '+..'
client = Twilio::REST::Client.new(account_sid, auth_token)
begin
client.messages.create(
from: alphanumeric_id,
to: recipient_phone_number,
body: "Hello Freya. We have received your item into the spa. It will be enjoying it's first treatment shortly. Love, The Handbag Spa"
)
rescue Twilio::REST::RequestError => error
if error.code == 21612
client.messages.create(
from: twilio_phone_number,
to: recipient_phone_number,
body: "Hello, this is a message from Andrew"
)
else
# handle this some other way
raise error
end
end
end
end
end
Trying these mail commands from the console locally works fine and I get the email returned in the console but in heroku console they return a nil object -
Spree::HmsCommunicator#progress_email: processed outbound mail in 5.0ms
=> #<ActionMailer::Base::NullMail:0x007fc9cc5c19b0>
However this works fine in the Heroku console?? -
ActionMailer::Base.mail(from: "test#example.co", to: "valid.recipient#domain.com", subject: "Test", body: "Test").deliver_now
I'm dying here, I need some help!