[exim] Symlinks in cert / keyfile

Hello,

as I can see Exim won't use certificates when the path is a link.

2017-05-26 23:35:16 exim 4.84_2 daemon started: pid=24590, -q30m,
listening for SMTP on port 25 (IPv4) port 587 (IPv4)
2017-05-26 23:35:16 Start queue run: pid=30515
2017-05-26 23:35:16 End queue run: pid=30515
2017-05-26 23:35:24 TLS error on connection from ... ([...]) [...]
(cert/key setup: cert=/etc/letsencrypt/live/mail.example.com/cert.pem
key=/etc/letsencrypt/live/mail.exmaple.com/privkey.pem): Error while
reading file.
^C

/etc/letsencrypt/live/mail.example.com# ls -la
insgesamt 12
drwxr-xr-x 2 root root 4096 Mai 26 17:24 .
drwx------ 4 root root 4096 Mai 26 17:17 ..
lrwxrwxrwx 1 root root 42 Mai 26 17:24 cert.pem ->
../../archive/mail.example.com/cert2.pem
lrwxrwxrwx 1 root root 43 Mai 26 17:24 chain.pem ->
../../archive/mail.example.com/chain2.pem
lrwxrwxrwx 1 root root 47 Mai 26 17:24 fullchain.pem ->
../../archive/mail.example.com/fullchain2.pem
lrwxrwxrwx 1 root root 45 Mai 26 17:24 privkey.pem ->
../../archive/mail.example.com/privkey2.pem
-rw-r--r-- 1 root root 543 Mai 26 17:17 README


When I use the real path it works.
Is there a bug report for that problem?

Best Regrads,
Basti