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Virus to my dell through email: ISP account and Web based account



 
 
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  #1  
Old January 15th 10, 03:09 PM posted to alt.sys.pc-clone.dell
Leigh
external usenet poster
 
Posts: 37
Default Virus to my dell through email: ISP account and Web based account

Greetings,

I know that lots of viruses can come with email attachments and in the email
itself.

Here is my question.

When I read my email that comes from my ISP email account I believe the
email is downloaded onto my Dell computer and is taken off of the ISP's
servers.

Now I am not sure about Web based email accounts like Yahoo! G mail, etc.

When I read an email from my Web based account am I reading the email from
the Web based server? I know that if I download and attachment from a Web
based email the attachment will come onto my hard drive, but what about just
a letter. Will that be downloaded onto my computer or am I reading letter
from their Web based servers and the letter is not downloaded to my
computer?

I hope you understand my question.

Thanks in advance for your help and support.

Leigh


  #2  
Old January 15th 10, 03:31 PM posted to alt.sys.pc-clone.dell
William R. Walsh[_2_]
external usenet poster
 
Posts: 932
Default Virus to my dell through email: ISP account and Web based account

Hi!

I know that lots of viruses can come with email attachments and in
the email itself.


When I read my email that comes from my ISP email account I
believe the email is downloaded onto my Dell computer and is taken
off of the ISP's servers.


Generally speaking, that is 100% correct. Most people retrieve their e-
mail over a POP (post office protocol) connection to their ISP's e-
mail server. And when you download those messages, everything attached
to them usually comes along for the ride.

There are some mail programs that can be set to download only message
bodies without attachments, or with attachments that fall under a
certain size. Some mail programs may also be set to leave messages on
the server (in case you plan to retrieve them later from another
computer).

When I read an email from my Web based account am I reading the
email from the Web based server?


Yes, that is correct. The web mail service will only serve what you
requested to see--so if all you ask to see is the message, there's no
point in delivering the attachment. Everything there is delivered upon
demand.

This can mean that there is an increased measure of safety in using
web mail services to read your mail. On a conventional POP mail setup
(as described above), you download everything by default. It can then
be assumed (by the writer of a virus) that since both pieces of the
message are together, an attack could be attempted. It would only be
successful if they knew what mail program you were using, knew of a
security vulnerability within that program or if they took a guess on
the two previous points and got lucky. Mail clients (especially
Microsoft's Outlook product) have become a lot more hardened since
such exploits were demonstrated many years ago.

It would be at least theoretically possible to do the same from a web
mail account. But I'd expect it to be much harder, as the attacker
would likely have to know the URL that should be sent back to the web
mail provider to retrieve the attachment. They'd also have to do a lot
of fancy trickery with scripting and exploiting security holes in your
browser to force an action to be taken with the malicious attachment.

Will that be downloaded onto my computer or am I reading letter
from their Web based servers and the letter is not downloaded to my
computer?


You are reading the letter from their servers...but...unless
specifically instructed not to, your web browser will cache a copy of
whatever web page you are presently viewing. That includes the pages
served by your web mail service. The cache is stored on your computer,
but it probably won't stay for very long as the space occupied is
small and gets used over and over again.

It will only contain web pages that you have chosen to view.

William
  #3  
Old January 16th 10, 10:42 AM posted to alt.sys.pc-clone.dell
OG
external usenet poster
 
Posts: 51
Default Virus to my dell through email: ISP account and Web based account


"William R. Walsh" wrote in message
...
Hi!

I know that lots of viruses can come with email attachments and in
the email itself.


When I read my email that comes from my ISP email account I
believe the email is downloaded onto my Dell computer and is taken
off of the ISP's servers.


Generally speaking, that is 100% correct. Most people retrieve their e-
mail over a POP (post office protocol) connection to their ISP's e-
mail server. And when you download those messages, everything attached
to them usually comes along for the ride.

There are some mail programs that can be set to download only message
bodies without attachments, or with attachments that fall under a
certain size. Some mail programs may also be set to leave messages on
the server (in case you plan to retrieve them later from another
computer).


Can I jump in here and recommend Mailwasher.
This downloads the header and the text only parts of the mail from your ISPs
mail server. Using this program, attachments don't get downloaded until you
have already had a chance to preview the message. Any you don't trust or
with unexpected attachments can be deleted from the mail server before they
get anywhere near your precious Dell.

As the program shows the text content only, it means you can easily identify
phishing emails, as any links within the text are shown with their true
target urls. So if a email claims to come from your bank and has a link that
claims to be to www.mybank.com/login you can see if it really links to
www.steal.all.your.money.ru


If you install this and set your mail program so that it downloads only on
demand (rather than automatically) you'll have a first line of protection


  #4  
Old January 29th 10, 01:56 AM posted to alt.sys.pc-clone.dell
Leigh
external usenet poster
 
Posts: 37
Default Virus to my dell through email: ISP account and Web based account


"Leigh" wrote in message
. ..
Greetings,

I know that lots of viruses can come with email attachments and in the
email itself.

Here is my question.

When I read my email that comes from my ISP email account I believe the
email is downloaded onto my Dell computer and is taken off of the ISP's
servers.

Now I am not sure about Web based email accounts like Yahoo! G mail, etc.

When I read an email from my Web based account am I reading the email from
the Web based server? I know that if I download and attachment from a Web
based email the attachment will come onto my hard drive, but what about
just a letter. Will that be downloaded onto my computer or am I reading
letter from their Web based servers and the letter is not downloaded to my
computer?

I hope you understand my question.

Thanks in advance for your help and support.

Leigh


Thanks for your responses


 




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