Hello,
I’ve tried implementing TLS SNI for my Postfix/Dovecot setup. I have it working in Postfix, but this example for Dovecot: https://doc.dovecot.org/configuration_manual/dovecot_ssl_configuration/#with-client-tls-sni-server-name-indication-support doesn’t seem to work for me. I’m using LetsEncrypt certificates. They work without a problem with the regular ssl_cert and ssl_key settings like this: ssl_cert = </docker/rancher-active-proxy/letsencrypt/live/datavenia.nl/fullchain.pem ssl_key = </docker/rancher-active-proxy/letsencrypt/live/datavenia.nl/privkey.pem … but as soon as I put them in local_name blocks like this: local_name datavenia.nl { ssl_cert = </docker/rancher-active-proxy/letsencrypt/live/datavenia.nl/fullchain.pem ssl_key = </docker/rancher-active-proxy/letsencrypt/live/datavenia.nl/privkey.pem } local_name verovia.nl { ssl_cert = </docker/rancher-active-proxy/letsencrypt/live/verovia.nl/fullchain.pem ssl_key = </docker/rancher-active-proxy/letsencrypt/live/verovia.nl/privkey.pem } and restart dovecot I get the following error: dovecot: imap-login: Error: Failed to initialize SSL server context: Can't load SSL certificate (ssl_cert setting): The certificate is empty: user=<>, rip=213.127.63.224, lip=142.93.135.7, session=<wKjTIaLJtSXVfz/g> I have verified that the certificate paths are correct, the files have content. I’ve already checked permissions (chmodded 777 to debug), as well as the that these are actually symlinks (updated the config to point to the real files) but nothing so far seems to change anything. I have also recreated my dh.pem (4096). I’m hoping anyone has any idea where I might be going wrong. Kind regards, Silvan Output of dovecot -n: # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.11.0-25-generic x86_64 Ubuntu 21.04 ext4 # Hostname: azrael00 auth_mechanisms = plain login mail_location = maildir:/var/mail/vhosts/%d/%n mail_privileged_group = mail namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } postmaster_address = postmas...@datavenia.nl <mailto:postmas...@datavenia.nl> protocols = imap lmtp service auth-worker { user = vmail } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { mode = 0666 user = vmail } user = dovecot } service imap-login { inet_listener imap { port = 0 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl = required ssl_dh = # hidden, use -P to show it userdb { args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n driver = static } local_name datavenia.nl { ssl_cert = </docker/rancher-active-proxy/letsencrypt/live/datavenia.nl/fullchain.pem ssl_key = # hidden, use -P to show it } local_name verovia.nl { ssl_cert = </docker/rancher-active-proxy/letsencrypt/live/verovia.nl/fullchain.pem ssl_key = # hidden, use -P to show it }