Issue with SMTP

Replies: 1

Hi,

we are using the plugin for serveral months without any problems. We received the last e-mail on 2019-11-13 from our website.

When I’m using the Email Test, most times it doesn’t work, but in some cases the mail is sent successfully. I can repeat this with 1 or 2 successful mails, but then is fails again.
The server can reach the smtp server and the STARTTLS port is not blocked. Are the any logs we I can see any details why the mail sending fails?
We are using an IIS 8.5, wordpress 5.2.4 and PHP 7.2.22

Thanks
Freddy