chore: Disable throwing error for malformed to address (#10464)

We don't need to raise error on sentry for malformed to address as it is already logged.

Fixes: https://linear.app/chatwoot/issue/CW-3151/standarderror-invalid-email-to-address-header-standarderror

app/mailboxes/application_mailbox.rb

@@ -8,12 +8,12 @@ class ApplicationMailbox < ActionMailbox::Base
 
   # routes as a reply to existing conversations
   routing(
-    ->(inbound_mail) { reply_uuid_mail?(inbound_mail) || in_reply_to_mail?(inbound_mail) } => :reply
+    ->(inbound_mail) { valid_to_address?(inbound_mail) && (reply_uuid_mail?(inbound_mail) || in_reply_to_mail?(inbound_mail)) } => :reply
   )
 
   # routes as a new conversation in email channel
   routing(
-    ->(inbound_mail) { EmailChannelFinder.new(inbound_mail.mail).perform.present? } => :support
+    ->(inbound_mail) { valid_to_address?(inbound_mail) && EmailChannelFinder.new(inbound_mail.mail).perform.present? } => :support
   )
 
   # catchall
@@ -37,8 +37,6 @@ class ApplicationMailbox < ActionMailbox::Base
     # checks if follow this pattern  send it to reply_mailbox
     # reply+<conversation-uuid>@<mailer-domain.com>
     def reply_uuid_mail?(inbound_mail)
-      validate_to_address(inbound_mail)
-
       inbound_mail.mail.to&.any? do |email|
         conversation_uuid = email.split('@')[0]
         conversation_uuid.match?(REPLY_EMAIL_UUID_PATTERN)
@@ -48,13 +46,12 @@ class ApplicationMailbox < ActionMailbox::Base
     # if mail.to returns a string, then it is a malformed `to` header
     # valid `to` header will be of type Mail::AddressContainer
     # validate if the to address is of type string
-    def validate_to_address(inbound_mail)
+    def valid_to_address?(inbound_mail)
       to_address_class = inbound_mail.mail.to&.class
-
-      return if to_address_class == Mail::AddressContainer
+      return true if to_address_class == Mail::AddressContainer
 
       Rails.logger.error "Email to address header is malformed `#{inbound_mail.mail.to}`"
-      raise StandardError, "Invalid email to address header #{inbound_mail.mail.to}"
+      false
     end
   end
 end