Inbound eMail Handler - monitor incoming mails

Question

I add a inbound email handler into my org to add a new record in a custom object (bt).

Sometime the mails are not processed and I don't know why. Is there a way to check the incoming mails in Salesforce?

can I enter a line in the code where the process should begin and end? Because sometimes is some text before or after the relevant points.

global class btFromEmail implements Messaging.InboundEmailHandler {
    
global Messaging.InboundEmailResult handleInboundEmail(Messaging.InboundEmail email, Messaging.InboundEnvelope envelope) {
    Messaging.InboundEmailResult result = new Messaging.InboundEmailResult();
    bt__c C = new bt__c(); 
        if(email.plainTextBody != Null && email.plainTextBody != '') {
            String[] emailBodyRows = email.plainTextBody.split('\n');
            for (String bodyRow:emailBodyRows) {
                String[] rowContents = bodyRow.split(':');
                String label = rowContents[0].trim();
                String value = rowContents[1].trim();
                switch on label {
                    when 'Firstname' {
                        c.Firstname__c = value;
                    }
                    when 'Lastname' {
                        c.Lastname__c = value;
                    }                 
                    when 'Birthdate' {
                         c.Birthdate__c = date.valueOf(value);
                    }                   
                    when 'Phone' {  
                        c.Phone_private__c = value;
                    }              
                    when 'Email' {        
                        c.E_mail_private__c = value;                                        
                    }                            
                }            
            }
        }
      insert c;             
      return result;
  }
    
}

Answer 1

Now I put all mails into a note, than I have an overview of mailtraffic.