13 Nov
2018
13 Nov
'18
5:08 p.m.
On 13/11/18 10:12, Brian Kantor wrote:
When I retired, I switched email servers from UCSD.EDU
to my own
domain, and mail from me was occasionally marked as spam by gmail.
That gradually stopped. But mail from me as brian(a)ampr.org that
was NOT in reply to a message I'd received was FREQUENTLY marked
as spam by gmail. Now, a year later, that is rare. I believe this
shows that Google is constantly adjusting its spam filtering
mechanism, and that some part of that adjustment is automated.
Gmail users can help
train the filter. Simply take any mail wrongly
marked as spam out of spam, and Gmail will use this as a training
input. If enough affected people do it enough times, the spam filter
does eventually learn.
Microsoft's email service (with all the names it goes by) has a
reputation of occasionally just discarding inbound mail with no
notification to either the sender or the recipient. I have proven
this with certain email contents such as long lists of IP addresses
in the body of the message; the message just vanishes. Attachments
seem to be better tolerated, gzip'd or bzip'd attachments seem to
get through most of the time.
Another thing is simple scripted email posters, as
commonly used by
scripts are also often victims of Microsoft mail deletion. I proved
this many years ago when clients of a training company I worked for at
the time were complaining that they weren't getting booking
information. It soon became apparent that all of the affected clients
had a Hotmail address, and testing with Hotmail showed that their
service silently deleted the automatic emails from our booking system.
--
73 de Tony VK3JED/VK3IRL
http://vkradio.com