Hello,
the last days I recognized a lot of frozen bounces
to yahoo.com addresses. I wondered why, because we
are doing a callout, especially for yahoo.com.
So I checked my config using exim -bhc (some foreign IP)
I took a random sender address: 123noop444@???
the result of the callout was
>>> Connecting to mx1.mail.yahoo.com [64.156.215.7]:25 from xxx.xxx.xxx.xxx
... connected
>>> SMTP<< 220 YSmtp mta268.mail.scd.yahoo.com ESMTP service ready
>>> SMTP>> HELO xxxxx
>>> SMTP<< 250 mta268.mail.scd.yahoo.com
>>> SMTP>> MAIL FROM:<>
>>> SMTP<< 250 null sender <> ok
>>> SMTP>> RCPT TO:<123noop444@???>
>>> SMTP<< 250 recipient <123noop444@???> ok
>>> SMTP>> QUIT
first I thought, I have hit an exisiting yahoo.com account,
but sending a non bounce-mail to it ends up with a bounce:
123noop444@???
SMTP error from remote mailer after end of data:
host mx1.mail.yahoo.com [64.157.4.78]: 554 delivery error:
dd This user doesn't have a yahoo.com account (123noop444@???) [0]
- mta122.mail.sc5.yahoo.com
So what are the yahoo-MTAs doing? Accept every null-sender mail, making
callouts impossible?
Did anyone else recognize this?
I am not amused...
Mit freundlichen Grüßen
Matthias Lewandowski
Systemtechnik Internet
Telefon +49 (30) 59 00 69-00
Telefax +49 (30) 59 00 69-99
CBXNET combox internet service gmbh
Potsdamer Strasse 96 - D-10785 Berlin
Amtsgericht Berlin-Charlottenburg - HRB 71171
Geschäftsführer: Lutz Treutler
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