We have a SharePoint on-premises 2013. and we are facing these 2 issues regarding that sharePoint is not sending emails from workflows and from alerts:-
1) First issue, is that inside SharePoint 2013 workflow or Nintex workflow, we will get this error when trying to send email:-
***The email message cannot be sent. Make sure the outgoing email settings for the server are configured properly***
2) Second issue, when end users try to create an alert >> the email field inside the alert popup's Delivery method will be different from what we defined inside the Outgoing email setting for the web application:-
and when we create the alert we will not get any welcoming email nor and alerts when we add/edit/delete items from the related list.
So any advice what could be causing those 2 issues?
Last point to mention, is that if inside Power shell i tried to send an email using SMTP i will get this test email.
Thanks