Felix Havemann wrote:
> Some spammers use an error in LotusNotes to relay email to an adress
> given as a local part in quotation marks to a local domain. e.g.: If
> you send an email to "bob@??? and mycompany.cno is
> your local domain, lotus sends the mail to bob@???.
> Luckily our customers Lotusnotes server is protected by an exim-server
> (Version 3.35 with Debian Linux) that proxies SMTP-connections. I do
> now try to craate a filter, that prevents local parts witch quotation
> marks to be delivered. My filter file looks like this:
>
> # Exim filter
> if $local_part contains \" then
> save /tmp/spam
> endif
>
> The filter is correctly installed but the emails are still delivered if
> an quotation mark is in the local part. Exim makes no difference
> between "user"@domain and user@domain
>
> Any ideas?
"user"@domain == user@domain
The first variant have local part quoted. The local part itself does not
contain any quotation mark. It does in the following example:
"user\""@domain
The latter form will be catched by your filter.
--
-- K.M.
