don't generate self signed smtp certificates

lib/postal/config.rb

@@ -153,14 +153,6 @@ module Postal
       raise ConfigError, "No config found at #{self.config_file_path}"
     end
 
-    unless File.exist?(self.smtp_private_key_path)
-      raise ConfigError, "No SMTP private key found at #{self.smtp_private_key_path}"
-    end
-
-    unless File.exist?(self.smtp_certificate_path)
-      raise ConfigError, "No SMTP certificate found at #{self.smtp_certificate_path}"
-    end
-
     unless File.exists?(self.lets_encrypt_private_key_path)
       raise ConfigError, "No Let's Encrypt private key found at #{self.lets_encrypt_private_key_path}"
     end

script/generate_initial_config.rb

@@ -15,25 +15,6 @@ unless File.exist?(Postal.config_file_path)
   puts "Created example config file at #{Postal.config_file_path}"
 end
 
-unless File.exists?(Postal.smtp_private_key_path)
-  key = OpenSSL::PKey::RSA.new(2048).to_s
-  File.open(Postal.smtp_private_key_path, 'w') { |f| f.write(key) }
-  puts "Created new private key for encrypting SMTP connections"
-end
-
-unless File.exist?(Postal.smtp_certificate_path)
-  cert = OpenSSL::X509::Certificate.new
-  cert.subject = cert.issuer = OpenSSL::X509::Name.parse("/C=GB/O=Test/OU=Test/CN=Test")
-  cert.not_before = Time.now
-  cert.not_after = Time.now + 365 * 24 * 60 * 60
-  cert.public_key = Postal.smtp_private_key.public_key
-  cert.serial = 0x0
-  cert.version = 2
-  cert.sign Postal.smtp_private_key, OpenSSL::Digest::SHA256.new
-  File.open(Postal.smtp_certificate_path, 'w') { |f| f.write(cert.to_pem) }
-  puts "Created new self signed certificate for encrypting SMTP connections"
-end
-
 unless File.exists?(Postal.lets_encrypt_private_key_path)
   key = OpenSSL::PKey::RSA.new(2048).to_s
   File.open(Postal.lets_encrypt_private_key_path, 'w') { |f| f.write(key) }