If its the sender address, i.e. the envelope then in acl_check_mail
something like:
#
# check length of sender's address
#
deny condition = ${if > {strlen:$sender_address}{200}}
message = Sender address is too long
logwrite = MAIL: Rejected sender's from:
$sender_address - address too long
should do it, otherwise if you want to test the 'From' header in the
body do something like:
#
# check length of From: header
#
deny condition = ${if > {strlen:$header_From}{200}}
message = From address header is too long
logwrite = MAIL: Rejected sender's From: header - too long
in the acl_check_data ?
Mike
On 12/12/2020 15:30, Jeremy Harris via Exim-users wrote:
On 12/12/2020 14:46, Frank Richter via Exim-users wrote:
It comes from an e-mail with an overlong From: header:
From: "…"
<PPPPPPPPPPPPPPKKKKKKKKKKKKKKKKKTTTTTTTTTTTTTTTTTTTTTTTTRRRRRRRRRRRRRRRRRRRRRRRRSSSSSSSSSSSSSSSSSSSSSSSSSSAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADDDDDDDDDDDDDDDDDFFFFFFFFFFFFFFFFFFFFFCCCCCCCCCCCCCCCBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB@…>
I'd like to reject such "address monsters". How's the best way to
achieve this?
Try a rewrite rule:
^.{40,}@tuced.eu [email protected]
before your existing rule. Then a simple match-and-deny in your data
ACL:
deny condition = ${if eq {[email protected]} {${address:$h_from:}}}
Rewrites for headers get processed before the data ACL, or you could
just do it all there.
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