[Discuss] [POSSIBLE SPAM] Spam

[John Blomfield]

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.

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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-- 
John Blomfield
Delivered by Thunderbird Email on Linux OpenSuse-KDE4