rejecting mail instead of failing it

[mind-field]

Hello,

We are using the mailing list softwared called ARP3 (arp3.com) and it relays on bounce messages to remove them or mark them bad in it's database.

Say the mailing list sends an email, it is a bad address or failed for some reason (over quota etc.) when it comes back, will it either.

A) Send a copy to the sender (mailing list) OR
B) Drop it and/or send a reply to the bad address?

Thanks and God Bless!

[C.P]

Originally posted by cyberspirit
When you set in cpanel as default address :fail: no such address here Exim actually accepts the message and then sends a notification back.
This creates unnecessary load in the server from spamers sending from unknown addresses because a failure notice will come back.
Is there a way for Exim to actually verify if a mailbox exists before accepting the message?
Not accepting the message to begin with is better because it puts the burden and stress on the sending server and in spamers cases slows down their machine instead of mine.
Other smtp servers do a check before accepting the message.
Any idea how to do it?

Okay when I tried this and hit the save button. I went back to the advance configuration to see it's been updated. I notice that the entire quote is no longer there. Is that normal?:

accept domains = +local_domains
endpass
message = unknown user
verify = recipient
accept domains = +relay_domains
accept hosts = +relay_hosts
accept condition = ${perl{checkrelayhost}{$sender_host_address}}

accept hosts = +auth_relay_hosts
endpass
message = $sender_fullhost is currently not permitted to \
relay through this server. Perhaps you \
have not logged into the pop/imap server in the \
last 30 minutes or do not have SMTP Authentication turned on in your email client.
authenticated = *

[PbG]

I changed:

message = unknown user

to:

message = no such address here

Restarted Exim and oh joy:

2004-02-27 21:15:49 H=(arcada.fi) [24.187.239.26] F=<judson_hendrickson_pw@mgmt.ucalgary.ca> rejected RCPT <danaiwut@ourdomain.com>: Sender verify failed
2004-02-27 21:16:28 H=(asgard.net.au) [218.108.215.188] F=<lorrainekelly_cf@ginko.de> rejected RCPT <danaiwut@ourdomain.com>: no such address here

I did this because no such address here is the actual message returned by Exim

Don't know if that did the trick but it's certainly working now. However if the customer has :fail no such address here: set as their default address they will not be able to send mail to their other accounts as previously stated.

Definately some room for improvement but again I'm just glad to see the mail que absent these messages.

[garak]

Originally posted by cyberspirit
When you set in cpanel as default address :fail: no such address here Exim actually accepts the message and then sends a notification back.
This creates unnecessary load in the server from spamers sending from unknown addresses because a failure notice will come back.
Is there a way for Exim to actually verify if a mailbox exists before accepting the message?
Not accepting the message to begin with is better because it puts the burden and stress on the sending server and in spamers cases slows down their machine instead of mine.
Other smtp servers do a check before accepting the message.
Any idea how to do it?

Hello!

I'm using Exim 4 and I don't find this ACL's in my config to change.

You could be tell how can I do for implement this in Exim 4, please ?

Thank you so much!

[Radio_Head]

please please darkorb can do something ?

I have one user which is receiving thousand email to

random@domain.com

mailnull is crashing the server ...

please please please !

[Radio_Head]

I stopped the account , but it didn't help !!

Only way to redure email queue is to stop exim or to terminate the account ...

thousand of email sent to

random@clientdomain.com ...


Help !

[Website Rob]

I don't see the problem?

The account in question simply uses: blackhole for random@domain.com

and/or

IP drop in IP Tables.

[Radio_Head]

Originally posted by Website Rob
I don't see the problem?

The account in question simply uses: blackhole for random@domain.com

and/or

IP drop in IP Tables.

I added blackhole but mailnull work a lot , a lot !!

[Radio_Head]

OK I am using


accept domains = +local_domains
endpass
message = unknown user
verify = recipient
accept domains = +relay_domains
accept hosts = +relay_hosts
accept condition = ${perl{checkrelayhost}{$sender_host_address}}



saved and restarted exim , but I continue to receive a lot of

werr@myclient.com
7239@myclient.com
sdiw@myclient.com
we2we@myclient.com
23sks@myclient.com

my queue continues to grow ..

[Website Rob]

Ok, see if the eMails are from the same IP / domain, if so, block the IP using 'iptables' and/or block the domain using a 'blacklist' if you have one setup.

Client can also setup their Mailbox to only accept eMail at certain addresses and :blackhole: anything else. Bit more work though than doing the above.

[Radio_Head]

Originally posted by Website Rob
Ok, see if the eMails are from the same IP / domain, if so, block the IP using 'iptables' and/or block the domain using a 'blacklist' if you have one setup.

Client can also setup their Mailbox to only accept eMail at certain addresses and :blackhole: anything else. Bit more work though than doing the above.

they are attacking using several ips . I just added
about 20 ips to my host.deny apf . If I exclude and ip they add another ...

I am going to terminate the account , as it seems no solution.

[garak]

Originally posted by Radio_Head
I added blackhole but mailnull work a lot , a lot !!

I discover that if user use catch-all in his domain, this modification in Exim not work, because it not overwrite the user preferences.

[Snowman30]

does this mod to exim still work? i had heard it no longer did?