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Comparators

GNU libsieve supports the following built-in comparators:

i;octet

This comparator simply compares the two arguments octet by octet

i;ascii-casemap

It treats uppercase and lowercase characters in the ASCII subset of UTF-8 as the same. This is the default comparator.

i;ascii-numeric

Treats the two arguments as ASCII representation of decimal numbers and compares their numeric values. This comparator must be explicitly required prior to use.