Change password doesn't update the mail server setup with the new password for Outgoing Mail

Issue Summary

Change password option in Outgoing SMTP mail server doesn't update the authentication credential password.

Steps to Reproduce

1. Configure new SMTP mail server in Jira Administration » System » Outgoing mail. Make sure the connection is tested successful and add it.
2. Check the mail server password in mailserver database table.
3. Edit the same outgoing mail server added in previous step.
4. Check the Change Password option and enter random password.
5. Test Connection from the SMTP Mail Server setup page.
6. Update the mail server configuration with the new password.
7. Check the mail server password in mailserver database table.
   (The same applies to Jira incoming mail server – reported in https://jira.atlassian.com/browse/JRASERVER-71771)

Expected Results

• Test Connection should fail with the random password.
• mailpassword value in mailserver database table should be updated to new encrypted password.

Actual Results

• Test Connection still tested successful with the random password.
• mailpassword value in mailserver database table remains with the same encrypted password.

Issue is reproducible in latest Jira release (8.14) and Jira releases >8.10.0, but not reproducible in Jira 7.13.x nor Jira 8.0.

Workaround

• Delete and re-create the mail server with the new password.
  OR
• Update the base64-encoded-password into the database table:

  UPDATE mailserver SET mailpassword='<base64-encoded password>' WHERE name = '<mail server name in Jira>';