>
> 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 deny_me@???
>>
>> before your existing rule. Then a simple match-and-deny in your data ACL:
>>
>> deny condition = ${if eq {deny_me@???} {${address:$h_from:}}}
Thanks.
This works for local parts from 40 up to 254 characters. For longer local
parts we get the same paniclog:
no @ found in the subject of an address list match …
So this isn't the proper solution yet.
These long addresses also comes an envelope-from now. This should be done in
an earlier ACL (acl_smtp_mail, acl_smtp_rcpt), not tested yet.
Frank
--
Frank Richter
URZ, Chemnitz University of Technology, Germany
