I tried all the suggestions in this thread and got further than I did before, but now I get a blank screen when I either request a forgotten password or send the test message from the plug-in settings page.
It takes a long time, then I just get a blank screen. It looks like something is timing out, but I get no errors at all – just nothing. I see the admin “skin” with the menu down the left, but the entire content area is blank. The url at this point is – https://mydomain.com/blog/wp-admin/options-general.php?page=wp-mail-smtp/wp_mail_smtp.php
I can’t even get to the “The result was:” screen. Do you guys have any suggestions on how to debug further?