How to protect from hacking the e-mail with the contractors?

Not competent in this matter... Maybe what encryption to use? Or electronic signature? Or even better your mail server to raise? Thanks in advance for the advice...
July 8th 19 at 12:02
5 answers
July 8th 19 at 12:04
For a start it makes sense to determine which risks you are going to be protected. The encryption will hide the contents from Resellers (people who have access to the e-mails between your computers). Electronic signature is intended to confirm that the content and the sender has not changed in the process of delivery.

If You are competent - your server obviously does not make sense - it will only increase the risk.

The classic way is to use PGP/GPG. But don't forget to use needs both You and Your contractors. And it is in very small cases, has any meaning without the use of other security measures, since at this stage to access the content of computers on which these letters write/read seems to be more straightforward.

I can still recommend the service to Proton Mail encryption built-in, plus there are some great features such as sending encrypted messages and a contractor that works with regular mail.
July 8th 19 at 12:06
not paranoia.
Encryption is good but it will have to adjust to all partners as they send you.
Normal passwords to help you and all will be well.

Option - use Clint for mail, have set up pop3 mail and deleting messages from the server immediately after downloading their client, but again this will protect you but your contractors again, not in deeds.
Thank You Alex. You are right, put the client, a good password and two-factor authentication. - shayne.Kub12 commented on July 8th 19 at 12:09
: duatepe is great, he everywhere include, simply because if salt somewhere pass then does not hurt :)
(The mail on Google with the binding domain) - logan66 commented on July 8th 19 at 12:12
why pop3? your best to keep your mail on your desktop/unencrypted computer than on the server in the same Google? - Anita52 commented on July 8th 19 at 12:15
: well, people worry about hacking and gaining access to the letters, and tuzhu base thunderbird-and no one bothers to keep on sifrovana section :)
And then the conversation is no longer about the security of servers and on the point of failure in the form of the user. - logan66 commented on July 8th 19 at 12:18
July 8th 19 at 12:08
Protection against "hacking" a mail account:
1. Allow entrance only with a subnet of Your ISP, where You shoot email.
2. A "strong" password
3. Use two-factor authentication
4. If Your server can use the authorization certificate.

Communication encryption:
1. Your mail server with SSL/TLS support
2. The Web-muzzle with the mail interface, and SSL/TLS traffic encryption.
Service checks:
So you can have If the provider accepts requests only from official mail, and the Internet went down. - shayne.Kub12 commented on July 8th 19 at 12:11
July 8th 19 at 12:10
To raise the level of their competence and the competence of the contractors. Otherwise, open the invoice, and there cryptographer. And they shall spread your business stand-office copper basin.

From an incompetent user, no antivirus software will help.
July 8th 19 at 12:12
Practical advice.
1. Encryption file system where mail is stored.
2. Encrypting connections between servers.
3. Digital signing of emails using DKIM.
4. Encryption of message texts, a La PGP.
For full control of your server. Better than a dedicated and clearly outside the Russian Federation.

Find more questions by tags E-mailEncryption1CSystem administration