[exim] Relay prevention in old config

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Szerző: Kai Bojens
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Címzett: exim-users
Tárgy: [exim] Relay prevention in old config
I recently found this in an old exim config:

###########################################################################
# Deny if the local part contains @ or % or / or | or !. These are
# rarely found in genuine local parts, but are often tried by people
# looking to circumvent relaying restrictions.
# Also deny if the local part starts with a dot. Empty components aren't
# strictly legal in RFC 2822, but Exim allows them because this is
# common.
# However, actually starting with a dot may cause trouble if the local
# part is used as a file name (e.g. for a mailing list).
deny    local_parts     = ^.*[@!/|] : ^\\.



Is this config still relevant? I couldn't think of any way of how to
circumvent relaying restrictions by using special characters.