wildfly-16.0.0.Final: "From address" is no more used as default from in email ----------------------------------------------------------------------------- Key: WFLY-11818 URL: https://issues.jboss.org/browse/WFLY-11818 Project: WildFly Issue Type: Bug Components: Mail Affects Versions: 16.0.0.Final Environment: mvn -v Apache Maven 3.6.0 (97c98ec64a1fdfee7767ce5ffb20918da4f719f3; 2018-10-24T20:41:47+02:00) Maven home: /apps/apache-maven-3.6.0 Java version: 11.0.2, vendor: Oracle Corporation, runtime: /usr/java/jdk-11.0.2 Default locale: de_DE, platform encoding: UTF-8 OS name: "linux", version: "4.12.14-lp150.12.48-default", arch: "amd64", family: "unix" Reporter: Wolfgang Mayer Assignee: Tomaz Cerar Priority: Major As mentioned in the Help (description) of 'Mail Session' configuration: From: *From address that is used as default from, if not set when sending* Apparently this is not the case anymore in wildfly-16.0.0.Final. For example I made a test with quickstart-16.0/mail/. When omitting the line *message.setFrom(new InternetAddress(from));* Sending mail fails with: com.sun.mail.smtp.SMTPSendFailedException: 554-Transaction failed 554 Unauthorized sender address. I have the same issue when replacing the line above with message.setFrom(new InternetAddress()); I am pretty sure that this is working in wildfly-15