Re: Mail Submission Protocol

Happily Microsoft have fixed their smtps stupidity, so you only need to support it on the server if you need to support users running old versions of Outlook etc. There was never anything particularly wrong with smtps, apart from a dogma in the IETF that it is architecturally wrong. The con

Re: Mail Submission Protocol

Raoul Bhatia [IPAX] wrote: > i recently had the problem that an lotus notes server insisted on sending emails to one of our clients via port 465. so having mandatory authentication there actually broke delivery for an exchange sender. Leave it "broken" for the other end that is. Only way to fo

Re: Mail Submission Protocol

On 4/21/2010 8:16 PM, Suresh Ramasubramanian wrote: The MAAWG BCPs have far more available than one of the worst maintained blacklists that has ever been in existence. For example: d/ -- Dave Crocker Brandenburg

Re: Mail Submission Protocol

On 22.04.2010 13:07, Tony Finch wrote: Er, no. TLS-on-connect aka smtps (as opposed to STARTTLS) is only used to support Microsoft MUAs that are more than a couple of years old. They only supported STARTTLS on port 25 and insisted on using the deprecated TLS-on-connect mode on all other ports. Th

Re: Mail Submission Protocol

On 22 Apr 2010, at 00:07, Franck Martin wrote: Consider also smtps port which should be treated like smtp port and not like submission port, or simply do not listen on smtps as TLS is available on smtp port via esmtp. Er, no. TLS-on-connect aka smtps (as opposed to STARTTLS) is only used

Re: Mail Submission Protocol

"Alex Kamiru" > Cc: nanog@nanog.org > Sent: Thursday, 22 April, 2010 1:35:56 PM > Subject: Re: Mail Submission Protocol > > Log and monitor all that you can. And watch for a large number of IPs > logging into an account over a day (over a set limit - even across > cou

Re: Mail Submission Protocol

do something. The main issue, it not to know which machines are hijacked, but to support these machines. - Original Message - From: "Suresh Ramasubramanian" To: "Alex Kamiru" Cc: nanog@nanog.org Sent: Thursday, 22 April, 2010 1:35:56 PM Subject: Re: Mail Submissi

Re: Mail Submission Protocol

Log and monitor all that you can. And watch for a large number of IPs logging into an account over a day (over a set limit - even across country - that takes into account "home - blackberry - airport lounge - airport lounge in another country - hotel - RIPE meeting venue" type scenarios). And esp

Re: Mail Submission Protocol

et/en/rblcheck.php and enter your AS/network and see how many of your clients are spamming due to mainly botnets. - Original Message - From: "Dave CROCKER" To: nanog@nanog.org Sent: Thursday, 22 April, 2010 10:17:28 AM Subject: Re: Mail Submission Protocol On 4/21/2010 6:49 AM, Claudi

Re: Mail Submission Protocol

On 4/21/2010 6:49 AM, Claudio Lapidus wrote: So we are considering ways to further filter this traffic. We are evaluating implementation of MSA through port 587. RFC 5068, Email Submission Operations: Access and Accountability Requirements, is a BCP. It specifies authenticated port 587 for

Re: Mail Submission Protocol

On 21 apr 2010, at 16.14, Leen Besselink wrote: > We added SSL to our SMTP-service and tell our customers to use SSL (not TLS) > with authentication and have the mailserver listen on the TCP-ports which > the mailclients pick for that (of which their are a few if I'm not mistaken). Assuming that

Re: Mail Submission Protocol

On Wed, Apr 21, 2010 at 10:49:07AM -0300, Claudio Lapidus wrote: > At our ISP operation, we are seeing increasing levels of traffic in our > outgoing MTA's, presumably due to spammers abusing some of our subscribers' > accounts. [snip] A discussion on this topic is happening on spam-l at the mome

RE: Mail Submission Protocol

pammers hijacking local users email clients -Mike -Original Message- From: Claudio Lapidus [mailto:clapi...@gmail.com] Sent: Wednesday, April 21, 2010 9:49 AM To: nanog@nanog.org Subject: Mail Submission Protocol Hello all, At our ISP operation, we are seeing increasing levels of

Re: Mail Submission Protocol

l to them and block them from sending any further email (with exception to support-staff for example). > -Mike > > -Original Message- > From: Claudio Lapidus [mailto:clapi...@gmail.com] > Sent: Wednesday, April 21, 2010 9:49 AM > To: nanog@nanog.org > Subject: Mail S

Re: Mail Submission Protocol

On Wed, Apr 21, 2010 at 10:49:07AM -0300, Claudio Lapidus wrote: > Hello all, > Hello Claudio, > At our ISP operation, we are seeing increasing levels of traffic in our > outgoing MTA's, presumably due to spammers abusing some of our subscribers' > accounts. In fact, we are seeing connections fr

Re: Mail Submission Protocol

On Apr 21, 2010, at 9:57 AM, Dan White wrote: > On 21/04/10 10:49 -0300, Claudio Lapidus wrote: >> Hello all, >> >> At our ISP operation, we are seeing increasing levels of traffic in our >> outgoing MTA's, presumably due to spammers abusing some of our subscribers' >> accounts. In fact, we are

RE: Mail Submission Protocol

stop spammers if they are hijacking the users local email client settings. -Mike -Original Message- From: Claudio Lapidus [mailto:clapi...@gmail.com] Sent: Wednesday, April 21, 2010 9:49 AM To: nanog@nanog.org Subject: Mail Submission Protocol Hello all, At our ISP operation, we are s

Re: Mail Submission Protocol

On 21/04/10 10:49 -0300, Claudio Lapidus wrote: Hello all, At our ISP operation, we are seeing increasing levels of traffic in our outgoing MTA's, presumably due to spammers abusing some of our subscribers' accounts. In fact, we are seeing connections from IPs outside of our network as many as t

Mail Submission Protocol

Hello all, At our ISP operation, we are seeing increasing levels of traffic in our outgoing MTA's, presumably due to spammers abusing some of our subscribers' accounts. In fact, we are seeing connections from IPs outside of our network as many as ten times of that from inside IPs. Probably all of