ingress SMTP

Jeff Kinz jkinz at
Fri Sep 5 12:38:32 CDT 2008

On Fri, Sep 05, 2008 at 10:35:15AM +0200, Mikael Abrahamsson wrote:
> On Fri, 5 Sep 2008, Simon Waters wrote:
> >If the ISP blocks port 25, then the ISP is taking responsibility for
> >delivering all email sent by a user, and they have to start applying rate
> >limits.
> MUAs should stop sending email via 25 and use 587 or equivalent instead. 
> There is little actual reason why someone should be able to send TCP/25 
> SMTP email from a residential connection when most software support 
> authenticated TCP/587 submits.

Just FYI- the ISP has the same 220 email address limit even when I send
thru port 587, authenticated.  (its comcast)
> We don't allow most of our residential customer base to speak SMTP TCP/25 
> to anywhere at all (and we have millions of them). Wish more ISPs would do 
> the same.
> -- 
> Mikael Abrahamsson    email: swmike at


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