-.IP \fBFETCHMAIL_IMAP_DELETED_REMAINS_UNSEEN\fP
-(since v6.3.20):
-If this environment variable is set and not empty, fetchmail will NOT mark
-messages retrieved through IMAP as \\Seen when they are deleted. This may suppress
-delivery notifications on some systems (some versions of HP OpenMail) and change them
-to mention "deleted without being read" on others (some versions of Microsoft Exchange).
-The default (if this variable is unset or empty) is to mark messages as \\Seen
-and \\Deleted at the same time.
+.IP \fBFETCHMAIL_DISABLE_CBC_IV_COUNTERMEASURE\fP
+(since v6.3.22):
+If this environment variable is set and not empty, fetchmail will disable
+a countermeasure against an SSL CBC IV attack (by setting
+SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS). This is a security risk, but may be
+necessary for connecting to certain non-standards-conforming servers.
+See fetchmail's NEWS file and fetchmail-SA-2012-01.txt for details.
+Earlier fetchmail versions (v6.3.21 and older) used to disable this
+countermeasure, but v6.3.22 no longer does that as a safety precaution.