How can I secure Ms outlook 2003 mail making sure the mail is from specific PC and outlook using LINUX server?

Answer 1

If you have limited numbers of machines connected and you know their addresses (internal network only) this is almaost totally covered in Postfix. I you want external SMTP available you should set up sasl security, this comes in the form of cyrus_sasl_auth. You may need to download the plain and logon parts, as thes are not always included. Unless you become a major ISP these methods are all you need, for tls you need certificates and a lot more playing. In main.cf you can set the types of authorisation to use. Also set up an access file, list approved senders. Whenever anyone tries to send claiming to be one of those users, Outlook will ask for a password, the normal POP3 password is OK. If they then click to remeber password they will not be asked again unless the password changes. An alternative to this for external access is to use Squirremail, it is a webmail server and if you allow extrenal web access, is far safer.

Answer 2

Probably a hundred ways. One that comes to mind is using procmail which allows you to sort incoming mail by different things. Set it to separate out the user you mean. That can be done as a user.

Another would be using your mail-handling software that receives the mail. On some linux that might be sendmail, on others it might be exim4, others might use qmail. Search on that program and the term white-list. A white-list is setting up email for "I only want to get mail from...". This is something that you need to be the administrator of the linux server to do.

Gandalf Parker

Answer 3

You need to use a PGP (or PGP-like) program. With PGP the sender can 'sign' his e-mail and receiver can then check that the e-mail is really from that person and that it has not been changed in away by anybody along the way.


Thunderbird and other mail programs support a PGP plug-in to do this. You could also use PGP stand alone to 'sign' an e-mail attachment.

In addition, PGP allows the sender to encrypt the mail so not only does the receiver know who it came from (and has not be changed) such that only the receiver can decrypt it.

Answer 4

definite, end making use of Outlook and go on on your Yahoo Mail account. that's, in spite of everything, a "internet depending" e-mail service, so that you do not choose a buggy, insecure e-mail customer software to get correct of entry to it.

Answer 5

thunderbird?