|Due to problems with thunderbird and my e-mail provider I will stop the automatic donatation.
After contacting my e-mail provider, they tell me I can not longer use thunderbird. In the past I did not have problems. When I send a mail with an attachment the system completely blocks and I receive the following message.
Reporting-MTA: dns;cpsmtpb-ews09.kpnxchange.com
Received-From-MTA: dns;cpsps-ews13.kpnxchange.com
Arrival-Date: Tue, 3 Jul 2018 12:55:05 +0200
Final-Recipient: rfc822;[email protected] Action: failed Status: 5.6.1 Diagnostic-Code: smtp;554 5.6.1 Body type not supported by Remote Host
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As a workaround you can try this: At the top right of the Thunderbird window, click the menu button > Options > Advanced > Config Editor. Confirm the "I'll be careful, I promise!" warning. Type "mime" into the filter box. Double-click the pref "mail.strictly_mime" to change the setting from "false" to "true". Close out and try again sending the message.