Can't find signature DKIM file?

Question

postfix

Good afternoon.
I'm trying to attach a DKIM signature to postfix and I keep getting this error

Dec 31 10:34:19 ip-172-31-29-80 postfix/cleanup[8012]: warning: connect to Milter service unix:/var/spool/postfix/var/run/opendkim/opendkim.sock: No such file or directory

Although the file is there and, as for me, with the correct rights.

-rwxrwxrwx 1 opendkim opendkim 887 Dec 30 13:40 opendkim.sock

opendkim is a member of the postfix group
Maybe someone faced such a problem?

Answer 1

Having the file is not enough, it needs to be a unix socket and be listened to by OpenDKIM. Most likely, OpenDKIM creates a socket in /var/run/opendkim/ and in postfix you are trying to open in /var/spool/postfix/var/run/opendkim/