Receiving with ?????? in instead of Japanese characters

Question

When I am trying to send mail with the Japanese template through email message code, I am getting ??????? in the subject line instead of Japanese characters.

The template works fine when I use it through 'Send Test and Verify Merge Fields' button on the template. I am using 'Unicode (UTF-8)' as encoding and tried others like JIS and EUC but no luck.

Below is the code sending the mail. Please let me know if you need any more details

private static void sendEmailToUsers(List<User> listUsers,Id whatId, Map<String, Id> mapEmailTemplate, String[] ccAddress, String emailTemplate) {

    List<Account> a = new List<Account>();
    a = accMap.values();

    List<Messaging.SingleEmailMessage> mailList = new List<Messaging.SingleEmailMessage>(); //created a list of SingleEmailMessage to collect all mails and send them in one go
    List<Messaging.SingleEmailMessage> mailnottosendList = new List<Messaging.SingleEmailMessage>();
    if(listUsers!=null && listUsers.size()>0){
        for(User userObject:listUsers){
            //Added below empty check for BUG-00137847 - Archana 
            if(mapEmailTemplate!=null && mapEmailTemplate.containsKey(emailTemplate +' '+ userObject.LanguageLocaleKey)){
                Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage(); 
                String[] toaddress1 = new String[]{};
                toaddress1.add(userObject.Email);
                mail.setOrgWideEmailAddressId(System.Label.L10N_EmailLebel);
                mail.setToAddresses(toaddress1);
                mail.setReplyTo(System.Label.L10N_ReplyTo);
                mail.setTemplateId(Id.valueOf(mapEmailTemplate.get(emailTemplate +' '+ userObject.LanguageLocaleKey)));

                if(ccAddress!=null && ccAddress.size()>0){
                    mail.setCcAddresses(ccAddress);
                }
                //changing the targetobjectId from user to contact
                system.debug('a[0].Contact__c + '+a[0]);
                system.debug('a[0].Contact__c + '+a[0].Contact__c);
                mail.setTargetObjectId(a[0].Contact__c);
                //System.debug('--BKz--2--'+whatId);
                mail.setWhatId(whatId);
                mail.setSaveAsActivity(false);
                mailnottosendList.add(mail);
                //   mailList.add(mail); //adding all mails to the list
                system.debug('mail-----1>'+mail);
            }
        }
    }
    Savepoint sp = Database.setSavepoint();
    Messaging.sendEmail(mailnottosendList);
    Database.rollback(sp);
    for(Messaging.SingleEmailMessage email : mailnottosendList){
        Messaging.SingleEmailMessage emailToSend = new Messaging.SingleEmailMessage();
        emailToSend.setToAddresses(email.getToAddresses());
        emailToSend.setPlainTextBody(email.getPlainTextBody());
        emailToSend.setHTMLBody(email.getHTMLBody());
        emailToSend.setSubject(email.getSubject());
        emailToSend.setCcAddresses(email.getCcAddresses());
        String[] bccAddress = new String[]{'orion@f-erhypla240c7rrmhxzgmu33p9z3pirf3jqz7x56y9eigyftft.4b-cwrpuac.cs51.apex.sandbox.salesforce.com'};
        emailToSend.setBccAddresses(bccAddress); 
        emailToSend.setOrgWideEmailAddressId(System.Label.L10N_EmailLebel);
        emailToSend.setReplyTo(System.Label.L10N_ReplyTo);
        emailToSend.setSaveAsActivity(false);
        mailList.add(emailToSend);
        system.debug('emailToSend-----1>'+emailToSend);
    }


    for(Integer j = 0; j < mailList.size(); j++ ){
        allMails.add(mailList.get(j));
    }

}

Answer 1

I did some search and found that on User Detail page the 'Email Encoding' field should be set to "Unicode (UTF-8)" for the functionality to work fine.