libsasl2-2 - 2.1.27+dfsg-1+deb10u2 main

This is the Cyrus SASL API implementation, version 2.1.
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SASL is the Simple Authentication and Security Layer, a method for
adding authentication support to connection-based protocols. To use
SASL, a protocol includes a command for identifying and
authenticating a user to a server and for optionally negotiating
protection of subsequent protocol interactions. If its use is
negotiated, a security layer is inserted between the protocol and the
connection. See RFC 2222 for more information.
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Any of: ANONYMOUS, CRAM-MD5, DIGEST-MD5, GSSAPI (MIT or Heimdal
Kerberos 5), NTLM, OTP, PLAIN, or LOGIN can be used.