Mailing List Archive

https://bugs.exim.org/show_bug.cgi?id=2677

Bug ID: 2677
Summary: local_part > 254 chars not pattern-matchable for
rewrite
Product: Exim
Version: 4.94
Hardware: x86
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: Address Rewriting
Assignee: unallocated@exim.org
Reporter: jgh146exb@wizmail.org
CC: exim-dev@exim.org

>> 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@tuced.de
>>
>> before your existing rule. Then a simple match-and-deny in your data ACL:
>>
>> deny condition = ${if eq {deny_me@tuced.de} {${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 …

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