[Discuss] [POSSIBLE SPAM] Spam

[John Blomfield]

The mail To: address is a different address in each case. There is one 
group of spam that are erotic in nature and addressed to jabfield at shaw 
(my address) which is just a case of some server getting my address but 
the other group, some of which are erotic but others that are business 
phishing that have addresses that are not mine and different Reply To 
addresses.

John

On 05/15/2016 07:51 AM, brendan wrote:
>
> On 16-05-14 11:42 AM, John Blomfield wrote:
>> Thanks Brendan. However, I don't seem to have anything labeled rcpt in
>> the header nor can I see any entry to jabfield at shaw.ca.
> that probably just means your mail server doesn't add the return-path
> header when it delivers mail to you.
>
> once in a blue moon a mail provider will have some sort of config
> problem where mail gets delivered to the wrong recipient, but that's
> exceedingly rare.
>
> BCC is a good practical example of how the message headers don't line up
> with message delivery - email addresses BCC'd don't end up in the
> headers, but are present in the mail to: section of the message envelope.
>
>
>
>> John
>>
>> On 05/14/2016 11:08 AM, brendan wrote:
>>> the To: field in an email message is not actually used to deliver the
>>> message - it's just an informational field for the recipient and may not
>>> be accurate if the sender is lazy.
>>>
>>> delivery is actually controlled by the smtp envelope rcpt to, which is
>>> often added as the Delivered-To: header inside a message by the
>>> receiving smtp server.
>>>
>>> an smtp transaction would look something like:
>>>
>>> < 220 mail.blah.blah.com SMTP
>>>> helo i.am.a.pony
>>> < 250 mail.blah.blah.blah
>>>> mail from:<brendan at ming.org>
>>> < 250 2.1.0 Ok
>>>> rcpt to:<b at b.com>
>>> < 250 2.1.5 Ok
>>>> data
>>> < 354 End data with <CR><LF>.<CR><LF>
>>> < Subject: Blah blah blah
>>> < From: <lies at ming.org>
>>> < To: <nobody at ming.org>
>>> <
>>> < blah blah blah
>>> < .
>>>> 250 Ok Queued as fang38_fb8422e34747
>>> the rcpt to command determines who the mail is going to, mail from is
>>> who is was sent from. the From and To in the data/headers section are
>>> irrelevant.
>>>
>>> however, spam filters will try and take a discrepancy between the
>>> envelope mail to and message header To and score messages that don't
>>> match as more likely to be spam.
>>>
>>> On 16-05-14 09:50 AM, Deryk Barker (Honorary Colleague) wrote:
>>>> You are on a Bcc list?
>>>>
>>>> -------
>>>> Deryk Barker, Faculty Emeritus
>>>> Computer Science Department
>>>> Camosun College, Victoria BC
>>>>
>>>> ________________________________________
>>>> From: Discuss [discuss-bounces at vlug.org] on behalf of John Blomfield
>>>> [jabfield at shaw.ca]
>>>> Sent: Saturday, May 14, 2016 9:19 AM
>>>> To: discuss at vlug.org
>>>> Subject: [POSSIBLE SPAM]  [Discuss] Spam
>>>>
>>>> I have recently been receiving spam emails which is not unusual but
>>>> these emails are not addressed to my email address but to someone
>>>> else's. There does not seem to be any link to my email address in the
>>>> header. How is it possible for these emails to end up in my inbox?
>>>>
>>>> Any ideas anyone?
>>>>
>>>> John
>>>>
>>>> -- 
>>>> John Blomfield
>>>> Delivered by Thunderbird Email on Linux OpenSuse-KDE4
>>>>
>>>>
>>>>
>>>>
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>>
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-- 
John Blomfield
Delivered by Thunderbird Email on Linux OpenSuse-KDE4