In Ubuntu 16.04 I used the following command to send an email with text and attachements, which worked fine.
echo "body" | mail -s "Subject" -A "/path/to/attachment" "email@adress"
In Ubuntu 20.04 this command attaches the body-part as an attachment too. The mail --version is 3.7.
Sending only the attachments or only the body is working fine.
This question is about mail from mailutils not mutt nor mailx nor sendmail, etc. A solution is very very welcome. Thx a lot!