In my old PHPList 2.10.19 I have a hyperlink on the footer where user can click to see the newsletter in browser, if something don’t work well with email client.
@AMota The plugin does not issue a “file not found” message.
If you meant “Not allowed to view message 999” then that is because the subscriber must either be on the lists to which the campaign is being sent or be a super admin. Ensure that you select the lists for the campaign before sending the test email. Then view in browser will work for the test email.
@duncanc My fault!!!
When I get the screenshoot to show you I found the issue, this browser I use for testing automatic change http to https. Clear all cookies and history, work now!!