Site Guest User can not send email in force.com site in salesforce

Question

I have already searched it through what could be the possible reason for not being able to send a single email as a site guest user on force.com site in salesforce

• Site guest user's email should be valid
• Site guest user has all the permission for sending email in public access
• Site guest user has all the required permission for the vf page along with the apex class

furthermore, I checked all the debug logs for the event and I couldn't find anything unusual

this is my demo code which is perfectly working fine for the admin user

// to.add(quoterec.OwnerId);
to.add('[email protected]');
Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
email.setSubject('Quote Accepted by Customer');
email.setToAddresses(to);
email.setHtmlBody('Quote Accepted by Customer');
Messaging.sendEmail(new Messaging.SingleEmailMessage[] { email });
System.debug('Test: Check Debug log ==> ' + email);

Answer 1

Edit:

You can set organization-Wide Addresses and use them when you want to send the email. Docuement: https://help.salesforce.com/s/articleView?id=sf.email_default_no_reply.htm&type=5 Example: https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_classes_email_outbound_single.htm#apex_Messaging_SingleEmailMessage_setOrgWideEmailAddressId

Please try as suggested, it should work

Previous Answer

I also faced the same problem but the issue is that when we creates the site than it doesn't populate the valid email address. so you should follow the below two steps.

1. Go to Site Profile →click on View users  → Edit the User  → replace the Email field with the Valid email address and username with name with domain (for ex:[email protected])
2. Open http://login.salesforce.com or http://test.salesforce.com (depending on your org type) → Forgot Password → Enter guestuser username(username created in step 1) → you will receive an email with a url → click on that (It will say You cannot reset your password but that’s fine our email is verified)

now try to send an email. it will work