Re: [sa] Re: Filter question

2009-12-01 Thread Benny Pedersen
On tir 01 dec 2009 16:59:12 CET, Charles Gregory wrote servers that your mail should be greylisted because it attempts to 'send mail' to too many non-existent addresses. One more reason to NOT verify addresses this way. well KISS to yahoo for not setting spf for there domains so we dont ne

Re: Filter question

2009-12-01 Thread Bob O'Brien
Wolfgang Zeikat wrote: Benny Pedersen wrote: postfix reject_unverified_sender does a vrfy Nope. It opens an SMTP connection and waits what the receiving MTA answers to "RCPT TO" Then it closes the connection. That is not vrfy. Hope this helps, wolfgang The VRFY mechanism

Re: [sa] Re: Filter question

2009-12-01 Thread Michael Scheidell
Charles Gregory wrote: On Tue, 1 Dec 2009, Wolfgang Zeikat wrote: Benny Pedersen wrote: postfix reject_unverified_sender does a vrfy Nope. It opens an SMTP connection and waits what the receiving MTA answers to "RCPT TO" Then it closes the connection. As a side note, among the other many e

Re: [sa] Re: Filter question

2009-12-01 Thread Charles Gregory
On Tue, 1 Dec 2009, Wolfgang Zeikat wrote: Benny Pedersen wrote: postfix reject_unverified_sender does a vrfy Nope. It opens an SMTP connection and waits what the receiving MTA answers to "RCPT TO" Then it closes the connection. As a side note, among the other many evils of 'callback verifi

Re: Filter question

2009-12-01 Thread Jared Hall
If it is from obviously bogus senders, perhaps some rules like these might be helpful (note that lines are wrapped): headerTBI_FROM_MISCFrom =~ /((GiftCardDivision|WarrantyExtension|viagra|HairClubOffers|goldcash|BabyOffersDept |CashLoanProvider|Rebate_Processor_Position|RebateProc

Re: Filter question

2009-12-01 Thread Thomas Harold
On 11/30/2009 7:36 PM, Benny Pedersen wrote: and what happend is spammers just send to random email addresses and discover user not found ?, nothing mta can do about this Well, in that case (a dictionary attack spam run where they just try all the common names), it would light up red flags in

Re: Filter question

2009-12-01 Thread chucker8
e spam > software to realize that this user does not exist and register the email > as spam. > > Is there any way to do this with SpamAssassin? > > thanks! > -- View this message in context: http://old.nabble.com/Filter-question-tp26581365p26593098.html Sent from the SpamAssassin - Users mailing list archive at Nabble.com.

Re: Filter question

2009-11-30 Thread Wolfgang Zeikat
Benny Pedersen wrote: postfix reject_unverified_sender does a vrfy Nope. It opens an SMTP connection and waits what the receiving MTA answers to "RCPT TO" Then it closes the connection. That is not vrfy. Hope this helps, wolfgang

Re: Filter question

2009-11-30 Thread Benny Pedersen
On man 30 nov 2009 21:54:37 CET, Thomas Harold wrote In general... no. Unless the other company is willing to give you access to their internal list of valid email accounts. well there is no point for spamassassin to know if a sender is valid recipient or not, whats counts for spamassassin

Re: Filter question

2009-11-30 Thread Benny Pedersen
On man 30 nov 2009 21:36:09 CET, Alex wrote You don't need SpamAssassin to do this. Most modern mail servers (postfix, sendmail, Exchange) can do this by default. Remove the default forwarding of non-existent addresses from being delivered to a general postmaster account, and explicitly define a

Re: Filter question

2009-11-30 Thread Thomas Harold
On 11/30/2009 4:00 PM, Alex wrote: Hi, While the SMTP RFCs do support the "VRFY" command (which would technically let you check whether the "FROM" address exists), probably 99% of all servers have disabled that command to prevent spammers from abusing it to validate their mailing lists. (See R

Re: Filter question

2009-11-30 Thread Alex
Hi, > While the SMTP RFCs do support the "VRFY" command (which would technically > let you check whether the "FROM" address exists), probably 99% of all > servers have disabled that command to prevent spammers from abusing it to > validate their mailing lists.  (See RFC 5321 section 3.5.2 and 7.3.

Re: Filter question

2009-11-30 Thread Thomas Harold
On 11/30/2009 3:32 PM, chucker8 wrote: Hello, I'm looking at spamassassin for our compnay's spam solution. We receive emails from u...@theirdomain.com, where the domain in correct but the user would be for instance, Viagra, which does not exist. We needthe spam software to realize that this use

Re: Filter question

2009-11-30 Thread Alex
Hi, > would be for instance, Viagra, which does not exist. We needthe spam > software to realize that this user does not exist and register the email as > spam. You don't need SpamAssassin to do this. Most modern mail servers (postfix, sendmail, Exchange) can do this by default. Remove the defaul

Filter question

2009-11-30 Thread chucker8
the email as spam. Is there any way to do this with SpamAssassin? thanks! -- View this message in context: http://old.nabble.com/Filter-question-tp26581365p26581365.html Sent from the SpamAssassin - Users mailing list archive at Nabble.com.