[ale] SMTP 554

[David Ritchie]

Does the address you are coming from have an MX record associated with the
domain you are connecting from? Many sites are now dropping connections
that don't match the MX, apparently.


On Fri, Mar 14, 2014 at 5:03 PM, JD <jdp at algoloma.com> wrote:

> The email admin might think you are a spammer - could be any number of
> reasons
> for that from any RBL service or just that the forward and reverse DNS
> lookups
> don't match.  If your server attempts too many connections too quickly,
> that can
> be deemed anti-social.  They can also blacklist any domain or IP if they
> like.
>
> On 03/14/2014 04:05 PM, Chris Fowler wrote:
> > I can not send mail to a certain host and I'm at a lost as to why I'm
> getting a 554.
> >
> > [root at support mail]# telnet mail03.regus.com 25
> > Trying 77.95.80.98...
> > Connected to mail03.regus.com (77.95.80.98).
> > Escape character is '^]'.
> > 554 mail03.regus.com
> > Connection closed by foreign host.
> > [root at support mail]#
> >
> >
> > cfowler at cfowler-desktop:~$ telnet mail03.regus.com 25
> > Trying 77.95.80.98...
> > Connected to mail03.regus.com.
> > Escape character is '^]'.
> > 220 mail03.regus.com ESMTP
> > quit
> > 221 mail03.regus.com
> > Connection closed by foreign host.
> > cfowler at cfowler-desktop:~$
> >
> > I've checked the DNSBL and all looks good.  What could this problem be?
> >
> > Chris
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