Re: Compromised email server

2017-10-21 Thread Peter
On 22/10/17 18:25, Henry wrote: > Does this mean, in the scenario above, that I am receiving a spam > message It may or may not be SPAM, I don't have enough evidence to confirm one way or the other. > i.e. "zvnpozz...@brev.krcnet.com" and the mail server is > bouncing it because it is over quota,

Re: Compromised email server

2017-10-21 Thread Viktor Dukhovni
> On Oct 22, 2017, at 12:11 AM, Henry wrote: > > root@mail:/var/log# grep EEA9AA65A2 mail.log > Oct 15 06:32:00 mail postfix/qmgr[1275]: EEA9AA65A2: > from=, size=9979, nrcpt=3 (queue active) You're not looking far enough back in the logs. This is a retry, the message did not just materialize

Re: Compromised email server

2017-10-21 Thread Peter
On 22/10/17 17:11, Henry wrote: > root@mail:/var/log# grep EEA9AA65A2 mail.log > Oct 15 06:32:00 mail postfix/qmgr[1275]: EEA9AA65A2: > from=, size=9979, nrcpt=3 (queue active) > Oct 15 06:32:03 mail postfix/lmtp[28970]: EEA9AA65A2: > to=, > relay=mail.mydomain.com[/var/lib/imap/socket/lmtp], delay

Re: Compromised email server

2017-10-21 Thread Henry
On Sun, Oct 22, 2017 at 1:27 PM, Viktor Dukhovni wrote: > > >> On Oct 21, 2017, at 9:23 PM, Henry wrote: >> >> # grep 1613DAE169 mail.log >> Oct 20 04:42:12 mail postfix/cleanup[23726]: 1613DAE169: >> message-id=<20171019174212.1613dae...@mydomain.com> >> Oct 20 04:42:12 mail postfix/bounce[23745

Re: Compromised email server

2017-10-21 Thread Viktor Dukhovni
> On Oct 21, 2017, at 9:23 PM, Henry wrote: > > # grep 1613DAE169 mail.log > Oct 20 04:42:12 mail postfix/cleanup[23726]: 1613DAE169: > message-id=<20171019174212.1613dae...@mydomain.com> > Oct 20 04:42:12 mail postfix/bounce[23745]: EEA9AA65A2: sender > non-delivery notification: 1613DAE169 T

Re: Compromised email server

2017-10-21 Thread Henry
On Sun, Oct 22, 2017 at 9:03 AM, Henry wrote: > I am not 100% sure however I suspect my email server has been compromised. > > I am using Kolab. > > I previously only logged inbound connections to my fw however I have > just tested logging outbound connections and I see multiple repeated > connect

Re: Compromised email server

2017-10-21 Thread Henry
On Sun, Oct 22, 2017 at 10:22 AM, Wietse Venema wrote: > Henry: >> Oct 22 08:41:37 mail postfix/smtp[18131]: 3E56FAD620: >> to=, relay=arebetter.com[68.178.213.61]:25, >> delay=3342, delays=3297/0.07/45/0, dsn=4.4.2, status=deferred (lost >> connection with arebetter.com[68.178.213.61] while recei

Re: Compromised email server

2017-10-21 Thread Gary
FWIW, the IP address looks like a legitimate reverse proxy vendor located in Canada. You might want to contact dosarrest security and inform them regarding the behavior of their less than stellar client.   Original Message   From: der...@gmail.com Sent: October 21, 2017 3:03 PM To: postfix-use

Re: Compromised email server

2017-10-21 Thread Wietse Venema
Henry: > Oct 22 08:41:37 mail postfix/smtp[18131]: 3E56FAD620: > to=, relay=arebetter.com[68.178.213.61]:25, > delay=3342, delays=3297/0.07/45/0, dsn=4.4.2, status=deferred (lost > connection with arebetter.com[68.178.213.61] while receiving the > initial server greeting) Show output from: $ grep

Compromised email server

2017-10-21 Thread Henry
I am not 100% sure however I suspect my email server has been compromised. I am using Kolab. I previously only logged inbound connections to my fw however I have just tested logging outbound connections and I see multiple repeated connections to a a few IPs on port 25. The prime contender is 69.

Re: Virtual Domains/ Users

2017-10-21 Thread Wietse Venema
cac...@quantum-equities.com: > How does DNS know where mail.example1.com is? Should I set it in > my registrar, in the mail system, in Apache as a virtual domain, > or where? Normally, someone pays a registrar, so that the payer can configure the names of DNS servers that hold DNS records for exa

Re: Virtual Domains/ Users

2017-10-21 Thread cacook
How does DNS know where mail.example1.com is? Should I set it in my registrar, in the mail system, in Apache as a virtual domain, or where? In /etc/postfix/virtual ( have     # Redirect system email so it can be picked up     root    r...@quantum-equities.com Will this bypass /var/spool/mail/ro

Re: easy DKIM question, at least i think it is...

2017-10-21 Thread Dominic Raferd
On 20 October 2017 at 18:28, Fazzina, Angelo wrote: > Hi, i have a small DKIM question. config files are at bottom of email. > I got it working but don't understand why ? > > The one change i made to get it to work was add > 137.99.0.0/16 to the TrustedHosts file. > > So tests with from of x.