email sending with delay - ruby-on-rails

Question

I wrote my website with Ruby on Rails. I want to add mail services to my app so that at a specific state a user gets an email that contain some details for them. My problem is when I test in development mode I get emails at least with one hours delay and I don't know why? Does it depend on server configuration?
I use Amazon as my email gateway
This is my code for sending emails
module Api
module V1
module User
module DailyCheckin
class Create
attribute :state, ::String
attribute :user, ::User
validates :state, presence: true
validates :user, presence: true
def call
add_error!(I18n.t('messages.daily_checkin.errors.state_invalid')) unless state.present?
#checkin = ::DailyCheckin.create!(
mood: ::Mood.find_by(state: state),
user: user
)
if state == "overwhelmed" || state == "not_coping"
logs = {
user_id: user.id,
email: user.profile.email,
organisation: user.organisation.name,
phone_number: user.profile.phone,
mood: state
}
::Api::V1::ApiGateway::Mail::DailyCheckinRiskNotice.call(logs: logs) if ENV.fetch("SEND_GATEWAY_MAIL", "true").eql? "true"
DailyCheckinRiskWorker.perform_async(user.profile.email, user.profile&.current_first_name, "daily_checkin_risk")
end
add_error!(Helpers::ErrorsHandler.parse(#checkin.errors)) unless #checkin.valid?
context[:mood] = #checkin.mood
end
end
end
end
end
end
and this is my gatways
module Api
module V1
module ApiGateway
module Mail
class DailyCheckinRiskNotice
include HTTParty
attribute :logs
validates :logs, presence: true
def call
options = {
headers: {
'Content-Type' => 'application/json',
'x-api-key' => ENV.fetch('MAIL_API_GATEWAY_API_KEY', '')
},
body: {
email_id: ENV.fetch('USER_ACTIVITY_NOTICE_MAIL_ID', ''),
content: {
logs: logs
}
}.to_json
}
response = HTTParty.post('', options)
add_error!(response.body) unless [201, 200].include?(response.code.to_i)
context[:body] = response.parsed_response
end
end
end
end
end
end
this is my mood model
class Mood < ApplicationRecord
enum state: %i[not_coping overwhelmed ok good great]
has_many :daily_checkins
end
and this my create method that create my logs is state was not coping or overwelmed
def create
result = ::Api::V1::User::DailyCheckin::Create.call(create_checkin_params.merge(user: #current_user))
return render json: Helpers::ErrorsHandler.view_parse(result.errors), status: :bad_request if result.errors
#mood = result.mood
render 'api/v1/moods/show'
end