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Athira VenugopalAthira Venugopal 

Mail not received using SingleEmailMessage()

I am working in Visual studio code. On the click of a lightning:button, I am calling a javascript method, inside the method I am calling a visual force page using window.open(url), submiting the form in visual force page, I am calling the apex class method to send an email. I got the message as 'Email Sent !!!,  but the mail was not received.

portion of JS

 openMail(event) {
 window.open('/apex/TestMail', 'Popup','height=500,width=600,left=100,top=100,resizable=no,scrollbars=yes,toolbar=no,status=no');
VF Page

<apex:page controller="singleEmailExample">
 <apex:form >
Email Address : <apex:inputText value="{!toAddress}" />
 <apex:commandButton value="SendEmail" action="{!sendingEmail}"/> <br/>
  Email Status :<b> {!message}  </b>

apex class

public with sharing class singleEmailExample {
    public string toAddress{get;set;}
    public string message{get;set;}
    public PageReference sendingEmail(){
        Messaging.SingleEmailMessage semail = new Messaging.SingleEmailMessage();
        String[] sendingTo = new String[]{toAddress};
        //String[] sendingToBccAdd = new String[]{‘XXXX@gmail.com’};
       // semail.setBccAddresses(sendingToBccAdd);
       // String[] sendingTocAdd = new String[]{‘XXXXX@gmail.com’};
      // semail.setCcAddresses(sendingTocAdd); */
        semail.setSubject('Single Email message Example');
        semail.setPlainTextBody('Hello!!!!!This is a test email to test single email message program');
        Messaging.sendEmail(new Messaging.SingleEmailMessage[] {semail});
        message='Email Sent !!!';
        return null;

Please help me , I tried a lot, and got disappointed
AnudeepAnudeep (Salesforce Developers) 
Hi Athira - I suggest reviewing email logs

Quick Find ---> Email Logs---> Request an Email Log.

This can confirm whether an email has been triggered or no.
Athira VenugopalAthira Venugopal

Hi Anudeep,
I have requested an email log. Now I am getting an error like this:
SendEmail failed. First exception on row 0; first error: SINGLE_EMAIL_LIMIT_EXCEEDED
AnudeepAnudeep (Salesforce Developers) 
Hi Athira - You are hitting a governor limit. See this document to learn how to check the usage https://help.salesforce.com/articleView?id=000331939&type=1&mode=1

There is a limit on the number of emails you can send from Apex, this is 5,000 per 24 hours and you would need to raise a case and engage with Salesforce to see if you can get this raised.

Also, look at this post around how to avoid this error

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