@Nitin_laad  We are facing this issue on Cloud Service. On Cloud there is some change for SMTP configuration. Please go through below link. we have all the configuration in place as mentioned. https://experienceleague.adobe.com/docs/experience-manager-learn/cloud-service/networking/examples/email-se...

com.day.cq.mailer.MailingException: org.apache.commons.mail.EmailException: Sending the email to the following server failed : ip : portat com.day.cq.mailer.impl.DefaultMailService.send(DefaultMailService.java:334)at com.day.cq.mailer.impl.DefaultMailService.send(DefaultMailService.java:46)at com.ad...