Public bug reported:
Binary package hint: postfix
postfix-2.5.5-1.1 (jaunty release candidate)
The default /etc/postfix/main.cf file contains the line:
smtpd_tls_mandatory_ciphers = medium, high
This is an invalid value; it must be either 'medium' or 'high', not
'medium, high'. With it set to 'medium, high', sending mail via the
submission port (uncommented in master.cf) results in the following
error message in /var/log/mail.log:
Apr 23 00:20:06 socket postfix/smtpd[28385]: warning:
localhost[127.0.0.1]: invalid TLS cipher grade: "medium, high": aborting
TLS session
The documentation (man 5 postconf) says this:
"smtpd_tls_mandatory_ciphers (default: medium). The minimum TLS cipher
grade that the Postfix SMTP server will use with mandatory TLS
encryption. Cipher types listed in smtpd_tls_mandatory_exclude_ciphers
or smtpd_tls_exclude_ciphers are excluded from the base definition of
the selected cipher grade. With opportunistic TLS encryption, the
"export" grade is used unconditionally with exclusions specified only
via smtpd_tls_exclude_ciphers."
** Affects: postfix (Ubuntu)
Importance: Undecided
Status: New
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postfix: invalid value for smtpd_tls_mandatory_ciphers in main.cf
https://bugs.launchpad.net/bugs/365390
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