RE: [PIUG List] E-mail spoofing - apologies

I did not receive Bullitt’s post but nonetheless I recommend greyli=
sting and requiring a match between the IP addresses belonging to the domai=
n name of the email address and the mail server.

 

But then our market is the corporate sector. A user whose domain name IP a=
ddresses does not match the mail servers’ IP addresses is not likel=
y to be a desirable client anyway.

 

BTW, AOL, Earthlink and some other ISPs are even stricter than our mail ser=
ver.

 

Alan Engel

Paterra, Inc.

Suite A24, 2-1-6 Sengen, Tsukuba

Ibaraki 305-0047 Japan

Email: aengel_at_paterra.com

 

 

  _____

From: Richard_Williams_at_vrtx.com [mailto:Richard_Williams_at_vrtx.com]
Sent: Tuesday, June 17, 2008 12:43 AM
To: PIUG Discussion List @ Listbox
Cc: PIUG Discussion List @ Listbox; aengel_at_paterra.com
Subject: RE: [PIUG List] E-mail spoofing - apologies

 


Hello, All,

Despite the many protective devices at our disposal, the sad fact remains t=
hat, if you cruise the very public internet highway, hobo's will read your =
tag number. what they do with that info is then pretty much out of your con=
trol. The only totally secure system is the one that is entirely locked dow=
n.

... such is the price of freedom and celebrity. I get junk mail all the tim=
e ... Outlook filters work for some; the rest gets filtered to trash the sa=
me as for the junk I fish from my US Postal mailbox.

wish there a better way,
rick

 <mailto:Richard_Williams_at_vrtx.com> Richard W. Williams
 <http://www.vrtx.com/> Vertex Pharmaceuticals, Inc.
130 Waverly Street
Cambridge, MA 02139
617-444-6325 v
617.444.6269 f
860.235.7116 m
Email: <mailto:Richard_Williams_at_vrtx.com> Richard_Williams_at_vrtx.com

Office:
MWTh: Hamilton 906 - MWTh
Kendall 3010-I - TuF

 




"C. Bullitt Darlington" <bullitt_at_ptd.net>

06/16/2008 11:34 AM


To

"PIUG Discussion List @ Listbox" <piug_discussion_list_at_v2.listbox.com>


cc

 


Subject

RE: [PIUG List] E-mail spoofing - apologies

 


 

 




Alan:

One of the problems with that approach is that, for a variety of good
reasons, sometimes a user can have different email addresses with
different domain extensions that don't match the sending ISP portal.
For example, my local ISP is dejazzd.com. and while I have email
addresses that end in @dejazzd.com, I also have addresses that end in
@ptd.net and @we-buy-books.com that I append to emails that I send
through my local ISP (dejazzd.com)

I understand the need to stem spam but the tighter you restrict your
rules, the more that legitimate mail gets throttled.

Bullitt

>People who receive these spoofed emails should complain to their own
>ISPs or mail administrators.
>
>There is a setting in email servers that tells the server to reject
>emails when the IP address of the sending email server does not
>match the IP addresses of the domain name in the email address. I
>have this setting on in our mail server and have received none of
>the spoofed emails. (Because of this setting in combination with a
>feature called 'greylisting,' I receive little spam even though my
>email address is widely available on the Internet.)
>
>Alan Engel
>Paterra, Inc.
>Suite A24, 2-1-6 Sengen, Tsukuba
>Ibaraki 305-0047 Japan
>Email: aengel_at_paterra.com




~~~~~~~~~~~~~~~~ www.we-buy-books.com ~~~~~~~~~~~~~~~~

C. Bullitt Darlington
email. bullitt_at_webuybooks.net
phone. 717.314.1197 :: fax. 717.627.2493

We Buy Books :: PO Box 129 :: Hopeland, PA 17533
Duplicates, Discards & Entire Collections of Scientific & Technical Books=
 



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Received on Wed Aug 06 2008 - 00:14:25