I am trying to send mail with the PHPlist software.
The test emails I send are rejected by the recipient probably because the DKIM signature is missing.
I don’t understand the reason why the signature is not inserted, since the signature is present in the mails sent by Thunderbird.
I would need to know the location of the private signature file in order to put it in the PHPlist configuration file.
The configuration problem was with PHPlist. I had mistakenly entered an incorrect email address. I simply corrected the email address in the PHPlist configuration file. I thank the Italian provider Aruba.it who took note of the problem.