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I try to send e-mails via SMTP without authentification and I'm getting the following error:

There was an error testing your email settings.

I checked my setup on https://www.smtper.net/. No problems!

I read through the troubleshooting-email-errors page but still found no solution for my problem.

Why can't I find a log under craft/storage/runtime/logs/craft.log. This file does not exist on my system. There is only craft/storage/logs/web.log.

When I use another SMTP server (with auth) everything works as expected. Any ideas on how to find out what's going on here?

  • Is there any related errors being logged in craft/storage/logs/web.log? – Brad Bell May 27 at 18:24
  • All I get there is: [info][yii\mail\BaseMailer::send] Sending email "This is a test email from Craft" to "myname@mycompany.de" [info][yii\swiftmailer\Mailer::sendMessage] Sending email "This is a test email from Craft" to "myname@mycompany.de" [warning][application] Error sending email: Connection could not be established with host mycompany-de.mail.protection.outlook.com [Connection timed out #110] – rttmax May 28 at 9:15
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My guess is that protection.outlook.com simply doesn't allow un-authenticated connections, because well... I'm sure they relay enough SPAM with authenticated connections, much less unauthenticated ones.

  • This was my guess too. But why does the same configuration work on smtper.net? As long as the sender e-mail is in our domain everything works fine. – rttmax May 29 at 7:56
  • Itt's the official way to send e-mails with office 365: docs.microsoft.com/de-de/exchange/mail-flow-best-practices/… – rttmax May 31 at 7:39
  • Where are you seeing that? "Requirements for SMTP client submission Authentication : You must be able to configure a username and password to send emails on the device." – Brad Bell May 31 at 18:57
  • I'm trying to do Option 2, Direct send and I tested the setup successfully in an other environment. – rttmax Jun 3 at 7:42

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