Hi!
We found a conflict with this plugin. It blocks all outgoing mails from WooCommerce. Mails are sending without problems if EVfWC is disabled. I tried the different sending ssystems (phpmail, wc-mail, wp-mail) and suthentication mechanism, but the problem is still there. Only after disabling the plugin, the mails are sent correctly.
This post explains the same problem as mine: https://wordpress.org/support/topic/conflict-with-vendor-plugin/
We updated the plugin to 2.0.4 but the problem is not solved. the last coment of that post is exactly what we have found.
We have installed Email Logs plugin to check this issue.
We need to dolve this problem because our shops send tons of mails based on custom order statuses and the changes between them. Woocommerce send personalized mails for those changes and now it is not sending any mail due to this problem.
Thanks in advance.