Digital signature – instruction

It happens increasingly, that the emails has been replaced by malware or criminal organizations.

Digital Signature of email is a proof of originality and prevents tampering by making sure that the received message is from Calmet sp. z o.o., not from fraud, and that the message was not altered in transit.

 

To learn how to verify a digital signature, please select your mail client:

Contents

• MS Outlook 2007, 2010, 2013, 2017
• Mozilla Thunderbird
• RitLabs The Bat!
• Google Mail
• Apple Mail
• Other email client

 

MS Outlook 2007, 2010, 2013, 2017

Open the Message and look at the header

• Verify 3 points:

a) From: This email address is being protected from spambots. You need JavaScript enabled to view it.

b) Signed by: This email address is being protected from spambots. You need JavaScript enabled to view it.

c) is marked: or

If any of these points (a, b or c) looks different then it means, that email is not sent by Calmet sp. z o.o. or was altered in transit.

 

Mozilla Thunderbird

• Open the Message and look at the header

• Verify 2 points:

a) From: This email address is being protected from spambots. You need JavaScript enabled to view it.

b) is marked:

• Press at the mark (b) button and verify 2 additional points:

c) Signed by: Calmet sp. z o.o.

d) Email address: This email address is being protected from spambots. You need JavaScript enabled to view it.

If any of these points (a, b, c or d) looks different then it means, that email is not sent by Calmet Sp. z o.o. or was altered in transit.

 

RitLabs The Bat!

• Open the Message and look at the header

• Verify 2 points:

a) From: This email address is being protected from spambots. You need JavaScript enabled to view it.

b) is marked:

Press at the mark  (b) button and verify 2 additional points:

1. c) Status: OK
2. d) Signed by: Calmet sp. z o.o.

If any of these points (a, b, c or d) looks different then it means, that email is not sent by Calmet sp. z o.o. or was altered in transit.

 

Google Mail

Open the Message and at the header press button (a)

• Verify 1 point:

b) From: This email address is being protected from spambots. You need JavaScript enabled to view it. with Verified email address

If this point (b) looks different then it means, that email is not sent by Calmet sp. z o.o. or was altered in transit.

 

Apple Mail

• Open the Message and look at the header

• Verify 3 points:

a) From: This email address is being protected from spambots. You need JavaScript enabled to view it.

b) Security: Signed (This email address is being protected from spambots. You need JavaScript enabled to view it.)

If any of these points (a or b) looks different then it means, that email is not sent by Calmet sp. z o.o. or was altered in transit.

 

Other email client

Please look at the user manual of a mail client and find how to validate Digital Signature of received mail.

 

If, based on the above instructions, it turns out that the email does not contain a valid electronic signature, then one should:

• scan the computer for viruses;
• update the software (operating system) and antivirus program;
• inform Calmet to receive the email again;
• inform the administrator of the local network.