?†? server replies
This interaction automatically establishes an authenticated stream using the CRAM-MD5
method.
If you wishto turn off additional encryption in SASL when STARTTLS is already
encrypting the communication, you do so by defining this AuthMaxBits option. When set,
this option limits the maximum encryption strength for the security layer in SMTP AUTH.
When not set (the default), encryption strength is essentially unlimited. The AuthMaxBits
option is used like this:
O AuthMaxBits=limit ?†? configuration file (V8.12 and later)
-OAuthMaxBits=limit ?†? command line (V8.12 and later)
define(`confAUTH_MAX_BITS??, `limit??) ?†? mc configuration (V8.12 and later)
Here, limit is the maximum number of bits in the key length. The existing encryption
strength is taken into account when choosing an algorithm for the security layer. For
example, if STARTTLS is used and the symmetric cipher is DES, the key length (in bits)
will be 168. By setting this option to:
define(`confAUTH_MAX_BITS??, `168??)
any encryption in SASL will be disabled.
The AuthMaxBits option is not safe. If specified from the command line, it can cause sendmail
to relinquish its special privileges.
24.9.5 AuthMechanisms
The AUTH mechanisms V8.10 and later
The AuthMechanisms option is used to declare the types of authentication you want to allow
to be passed in the AUTH ESMTP extension (see RFC2554).
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