On 2022-07-08, Stuart Henderson <[email protected]> wrote: > You are missing the intermediate certificate on the server.
visually: imap - presents an intermediate cert, providing a path to the trusted root cert --- Certificate chain 0 s:/CN=mail.thinkerwim.org i:/C=US/O=Let's Encrypt/CN=R3 1 s:/C=US/O=Let's Encrypt/CN=R3 i:/C=US/O=Internet Security Research Group/CN=ISRG Root X1 2 s:/C=US/O=Internet Security Research Group/CN=ISRG Root X1 i:/O=Digital Signature Trust Co./CN=DST Root CA X3 --- smtp - doesn't --- Certificate chain 0 s:/CN=mail.thinkerwim.org i:/C=US/O=Let's Encrypt/CN=R3 ---
