Hi Lilley

I have done your senario so for this you need to follow some steps.

steps 1 : Create Detail Page Button on Match object.
step 2 : select Behavior of custom button execute javascript .
step 3 : write this code which i mentioned.



{!REQUIRESCRIPT("/soap/ajax/15.0/connection.js")}
{!REQUIRESCRIPT("/soap/ajax/15.0/apex.js")}
var returnFlag = sforce.apex.execute("testhost.SendEmailUsingWebserive","sendEmail",{matchid:'{!match__c.Id}'}); 
location.reload(true); 



step 4 : save this and set this cutom button at layout

step 5 :  create class and put code i mentioned below.

global class SendEmailUsingWebserive 
{
     webService static void sendEmail(String matchid) 
    { 
           string varconid = matchid;
           List<match__C>listofmatch =[select id , Volunteer_Email__c , Name  from match__C where id =: varconid];
            List<Messaging.SingleEmailMessage> mails = new List<Messaging.SingleEmailMessage>();
            if(listofmatch .size()>0){
                for(match__C obj : listofmatch ){
                        if(obj.Volunteer_Email__c  != null){
                        obj.testhost__Volunteer_Email_Sent_Date_c__c=system.today();
                        // Email code //
                        Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
                        List<String> sendTo = new List<String>();
                        sendTo.add(obj .Email);
                        mail.setToAddresses(sendTo );
                        mail.setSenderDisplayName('Details');
                        List<String> ccTo = new List<String>();
                        mail.setCcAddresses(ccTo);
                        mail.setSubject('Hi ');
                        String body = 'Hi' +obj.Name  +', ';  
                        body += '<br/>';
                        body += '<br/>';
                        body += 'Congratulations on your acceptance has been done<br/>';
                        mail.setHtmlBody(body);
                        mails.add(mail);
                 }
             }
            }
            
            if(mails.size()>0){
                Messaging.sendEmail(mails);
                update listofContact ;
                
            }
      
    }
    
      
}


o/p :  See here is custom button whenever i will click here email will be go and here is one date field which will update as per your requirement.
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