I want my Omada TP Link System to send mails to Mailcow.
Unfortunatelly postfix is telling:
warning: TLS library problem: error:14094416:SSL routines:ssl3_read_bytes:sslv3 alert certificate unknown:../ssl/record/rec_layer_s3.c:1544:SSL alert number 46:
Where can I put in my self signed certificate of Omada as a trusted one, which certificate store is postfix using, or can I just disable STARTTLS on this specific mailbox.
Thanks a lot.