Hello i write a trigger (When account type is update send mail to all releted contacts)
trigger WhenAccountTypeIsChange_SendEmailToAllReletedContacts on Account (After Update) {
set<id> AccountId=new set<id>();
for(account a:Trigger.new){
    if( a.type!=Trigger.oldMap.get(a.id).type){
        AccountId.add(a.id);
    }
}
list<Messaging.singleEmailMessage> mailList=new list<Messaging.singleEmailMessage>();
list<contact> contactlist=[select email from contact where AccountId in:AccountId];
for(account acc:Trigger.new){
    for(integer i=0; i<contactlist.size();i++){
        contact con=contactlist.get(i);
    Messaging.singleEmailMessage mail=new Messaging.singleEmailMessage();
    list<string> toAddress=new list<string>();
    toAddress.add(con.Email);
    mail.setTargetObjectId(con.id);
   mail.setToAddresses(toAddress);
    mail.setsubject('Account Update Info');
    mail.setHTMLBody('Your Account information Updated successfully.<br/>account Name: ' +acc.Name+
    '<br/>Your AccountType Is Changed To '+Acc.Type);
    mailList.add(mail);
    
}
}
Messaging.SendEmail(mailList);
}
but getting error
WhenAccountTypeIsChange_SendEmailToAllReletedContacts: execution of AfterUpdate caused by: System.EmailException: SendEmail failed. First exception on row 0; first error: SINGLE_EMAIL_LIMIT_EXCEEDED, Email limit exceeded: [] Trigger.WhenAccountTypeIsChange_SendEmailToAllReletedContacts: line 26, column 1
i have 2 contacts releted to account but mail goes to 1st contact only is  there any way to send more than one person without referencing exact email id
Thank you