I have installed the “Subscribe by Email” plugin

Hi

I have installed the “Subscribe by Email” plugin and experiencing some issues with Gmail and Hotmail.

I have installed WP-Mail-SMTP plugin and configured its settings and everything works just fine.

After adding subscribers, the subscribed email receives the confirmation mail and when confirming, their information is updated to “email confirmed” in the subscribers plugin menu.

The issue is now, that they do not receive any maila when new posts are published (posts are included in the content tab under settings) and the Email Log -> Email Details, show “Error” next to them. This is only for Gmail and Hotmail, other emails address e.g. our own "...@ecalon.it" works just fine.

Please advise me on how to fix this issue.