cybersecurity

This is what my fetchmail log looks like today (UIDs and domains obfuscated):

fetchmail: starting fetchmail 6.4.37 daemon
fetchmail: Server certificate verification error: self-signed certificate in certificate chain
fetchmail: Missing trust anchor certificate: /C=US/O=Let's Encrypt/CN=R3
fetchmail: This could mean that the root CA's signing certificate is not in the trusted CA certificate location, or that c_rehash needs to be run on the certificate directory. For details, please see the documentation of --sslcertpath and --sslcertfile in the manual page. See README.SSL for details.
fetchmail: OpenSSL reported: error:0A000086:SSL routines::certificate verify failed
fetchmail: server4.com: SSL connection failed.
fetchmail: socket error while fetching from user4@server4.com@server4.com
fetchmail: Query status=2 (SOCKET)
fetchmail: Server certificate verification error: self-signed certificate in certificate chain
fetchmail: Missing trust anchor certificate: /C=US/O=Let's Encrypt/CN=R3
fetchmail: This could mean that the root CA's signing certificate is not in the trusted CA certificate location, or that c_rehash needs to be run on the certificate directory. For details, please see the documentation of --sslcertpath and --sslcertfile in the manual page. See README.SSL for details.
fetchmail: OpenSSL reported: error:0A000086:SSL routines::certificate verify failed
fetchmail: server3.com: SSL connection failed.
fetchmail: socket error while fetching from user3@server3.com@server3.com
fetchmail: Server certificate verification error: self-signed certificate in certificate chain
fetchmail: Missing trust anchor certificate: /C=US/O=Let's Encrypt/CN=R3
fetchmail: This could mean that the root CA's signing certificate is not in the trusted CA certificate location, or that c_rehash needs to be run on the certificate directory. For details, please see the documentation of --sslcertpath and --sslcertfile in the manual page. See README.SSL for details.
fetchmail: OpenSSL reported: error:0A000086:SSL routines::certificate verify failed
fetchmail: server2.com: SSL connection failed.
fetchmail: socket error while fetching from user2@server2.com@server2.com
fetchmail: Query status=2 (SOCKET)
fetchmail: Server certificate verification error: self-signed certificate in certificate chain
fetchmail: Missing trust anchor certificate: /C=US/O=Let's Encrypt/CN=R3
fetchmail: This could mean that the root CA's signing certificate is not in the trusted CA certificate location, or that c_rehash needs to be run on the certificate directory. For details, please see the documentation of --sslcertpath and --sslcertfile in the manual page. See README.SSL for details.
fetchmail: OpenSSL reported: error:0A000086:SSL routines::certificate verify failed
fetchmail: server1.com: SSL connection failed.
fetchmail: socket error while fetching from user1@server1.com@server1.com
fetchmail: Query status=2 (SOCKET)

In principle I should be able to report the exit node somewhere. But I don’t even know how I can determine which exit node is the culprit. Running nyx just shows some of the circuits (guard, middle, exit) but I seem to have no way of associating those circuits with fetchmail’s traffic.

Anyone know how to track which exit node is used for various sessions? I could of course pin an exit node to a domain, then I would know it, but that loses the benefit of random selection.