Because IF does not support PHP Mail. You have to setup SMTP mailing. If the plugin you have does not have this feature, install the plugin “WP Mail SMTP” as well (Spelling of plugin may be off).
Because IF does not support PHP Mail. You have to setup SMTP mailing. If the plugin you have does not have this feature, install the plugin “WP Mail SMTP” as well (Spelling of plugin may be off).