[An on-line version of this announcement will be available at
http://www.postfix.org/announcements/postfix-3.5.4.html]
Fixed in Postfix 3.5.4, 3.4.14:
* The connection_reuse attribute in smtp_tls_policy_maps always
resulted in an "invalid attribute name" error. Fix by Thorsten
Habich.
* SMTP over TLS connection reuse always failed for Postfix SMTP
client configurations that specify explicit trust anchors (remote
SMTP server certificates or public keys). Reported by Thorsten
Habich.
Fixed in Postfix versions 3.5.4, 3.4.14, 3.3.12, 3.2.17:
* The Postfix SMTP client's DANE implementation would always send
an SNI option with the name in a destination's MX record, even
if the MX record pointed to a CNAME record. MX records that
point to CNAME records are not conformant with RFC5321, and so
are rare.
Based on the DANE survey of ~2 million hosts it was found that
with the corrected SMTP client behavior, sending SNI with the
CNAME-expanded name, the SMTP server would not send a different
certificate. This fix should therefore be safe.
You can find the updated Postfix source code at the mirrors listed
at http://www.postfix.org/.
Wietse
