Salesforce Apex Email Messaging Helper Library

MessagingHelper.cls

public without sharing class MessagingHelper {

    public static void send(Messaging.SingleEmailMessage mail) {
        MessagingHelper.handleSendEmailResult(Messaging.sendEmail(MessagingHelper.createEmailMessages(mail)));
    }

    public static Messaging.EmailFileAttachment[] createEmailFileAttachment(String filename, Blob body) {
        Messaging.EmailFileAttachment emailAttachment = new Messaging.EmailFileAttachment();
        emailAttachment.setFileName(filename);
        emailAttachment.setBody(body);
        return new Messaging.EmailFileAttachment[] {emailAttachment};
    }

    public static Messaging.SingleEmailMessage[] createEmailMessages(Messaging.SingleEmailMessage mail) {
        Messaging.SingleEmailMessage[] messages = new List<Messaging.SingleEmailMessage>();
        messages.add(mail);
        return messages;
    }
    
    public static void handleSendEmailResult(Messaging.SendEmailResult[] results) {
        for(Messaging.SendEmailResult result :results) {                                    
            if(!result.IsSuccess()) {                    
                List<Messaging.SendEmailError> errors = result.getErrors();
                if (errors.size() > 0){
                    Messaging.SendEmailError err = errors[0];
                    System.debug(err.getMessage());       
                }                	
            }
        } 
    }
}