It happens increasingly, that the emails has been replaced by malware or criminal organizations.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

Open the Message and look at the header

MS Outlook 1

  • 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: MS Outlook 2 or MS Outlook 3

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

Mozilla Thunderbird 1

  • Verify 2 points:

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

b) is marked: Mozilla Thunderbird 2

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

Mozilla Thunderbird 3

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

RitLabs The Bat 1

  • Verify 2 points:

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

b) is marked: RitLabs The Bat 2

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

RitLabs The Bat 3

  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)

Google Mail 1

  • Verify 1 point:

b) From: This email address is being protected from spambots. You need JavaScript enabled to view it. with Google Mail 2Verified 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

Apple Mail 1

  • Verify 3 points:

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

b) Security: Apple Mail 2Signed (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.

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