wildfly-16.0.0.Final: Apparently "From address" is no more used as default from in email

[mayerw01]

As mentioned in the Help 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 sane issue when replacing the line above with

message.setFrom(new InternetAddress());

I am pretty that this is working in wildfly-15

[mayerw01]

I've now created a bug report: [WFLY-11818] wildfly-16.0.0.Final: "From address" is no more used as default from in email - JBoss Issue Tracker

[mayerw01]

I think this is a bug in WildFly. But following workaround works

message.setFrom(new InternetAddress(mySession.getProperty("mail.from")))