Yahoo! Mail Issue

Matthew Petach mpetach at
Tue Apr 12 04:47:55 UTC 2011

On Mon, Apr 11, 2011 at 9:28 PM, Nathanael C. Cariaga
<nccariaga at> wrote:
> Hi All,
> It seems that we're having some problems receiving emails from selected
> Yahoo! Mail Accounts.  I noticed that there is a commonality between the
> accounts that fails when sending an email to our domain (see email header
> below)
> From: "MAILER-DAEMON at"
> To: *-*-*-*-*a at
> Sent: Fri, April 8, 2011 6:26:08 PM
> Subject: Failure Notice
> Sorry, we were unable to deliver your message to the following address.
> <xxxxxxxxxa at>:
> Mail server for "" unreachable for too long might be easier to get mail, if your host didn't close
the connection with a 5xx error.  :/

mpetach at hinotori:~> host -t mx mail is handled by 20 mail is handled by 20 mail is handled by 40
mpetach at hinotori:~> nslookup

Non-authoritative answer:

mpetach at hinotori:~>

mpetach at opstools1:~> telnet 25
Connected to
Escape character is '^]'.
554 SMTP synchronization error
Connection closed by foreign host.
mpetach at opstools1:~>

I imagine when port 25 stops giving 5xx
failure message back, mail reception
might improve.   ^_^;


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