Re: ssl with dslextreme.com attempts to send a spurious email

On 20190429 16:02:24, Matthias Andree wrote:
> Am 27.04.19 um 23:28 schrieb jdow:
>> fetchmaillog per item 5.txt
>>
>> Syslog from:  env LC_ALL=C /usr/bin/fetchmail -d 60 --fetchmailrc
>> /home/jdow/.fetchmailrc
>>
>>
>> Apr 27 13:57:30 thursday fetchmail[31459]: starting fetchmail 6.3.24
>> daemon
>> Apr 27 13:57:32 thursday fetchmail[31459]: 1 message for
>> [email protected] at pop.earthlink.net (4706 octets).
>> Apr 27 13:57:32 thursday postfix/smtpd[30762]: connect from
>> localhost[::1]
>> Apr 27 13:57:32 thursday postfix/smtpd[30762]: warning: Illegal
>> address syntax from localhost[::1] in MAIL command:
>> <[email protected]>
>> Apr 27 13:57:32 thursday fetchmail[31459]: reading message
>> [email protected]@pop.earthlink.net:1 of 1 (4706 octets) (log message
>> incomplete)
>> Apr 27 13:57:32 thursday fetchmail[31459]: SMTP error: 501 5.1.7 Bad
>> sender address syntax
>> Apr 27 13:57:32 thursday fetchmail[31459]: not flushed
>> Apr 27 13:57:32 thursday postfix/smtpd[30762]: disconnect from
>> localhost[::1]
> 
> 
> Joanne,
> 
> This pretty much looks like the faulty message is in the
> pop.earthlink.net account rather than the dslextreme.com, and I haven't
> seen configuration or verbose logging of the earthlink polls yet in this
> thread, unless I am overlooking something... and Postfix is right to
> reject the mail address, it is outside the permitted syntax for MAIL
> commands per the BNF syntax in RFC-5321 (page 41 bottom/42 top - in
> prose that specifies that the hyphen cannot be head or tail of a
> sub-domain part, but must be surrounded by "letter or digit").
> 
> The log message incomplete stems from the log "reading message" that
> gets interrupted by the 501 5.1.7 error, logging makes this excursion,
> and finally the "not flushed" concludes the original log message.
> 
> HTH
> 

For testing I disable the Earthlink accounts. That is why you don't see it.

That said I doctored the .fetchmailrc file bringing down to a forced plain text. 
The message persisted. I rewrote the file (cleared it and retyped the text) and 
now the problem seems to have resolved. The data appears to be the same. The 
issue seems to be gone. I REALLY REALLY wish I know what change I made worked. 
But, I suspect it will be a phenomenon with nothing further known about it.

(Yes, it was dumb of me to edit the way I did. I should have saved the old file 
to compare with the new. Ah well. I should know better. At least the log clutter 
is gone. Hm, I ought to play with tcpdump to see if there is an smtp connection 
going outside. I doubt it as that address bounced email from amazonaws with an 
account does not exit error. If there is such a thing you will hear from me again.)

{O.O}   Joanne



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