Hi All, I have used it the below code and it's working as of now.but thing this is not proper way. Configuration configuration = configAdmin.getConfiguration("com.day.cq.mailer.DefaultMailService");if (configuration != null) {// get propertiesDictionary properties = configuration.getProperties();Dictionary newProperties = properties;// update propertiesif(properties == null){newProperties = new Hashtable();}// update new propertiesconfiguration.update(newProperties); // revert to old propertycon...

JeevanRaj I have tried your solution but still, I am getting mail from the sender which is configured in the AEM CQ mail service with valid credentials.I am getting emails on my Gmail ID.but the new sender is not reflected.

Email email;email.setFrom("test@example.com") - Not working 

I have rechecked the above solution but not working.

Yes tried with this "from" address field then only that value picked. I am not able to change at runtime