Legalistic Evaluation of E-Mail Headers Based on Address Spoofing

Abstract

in this new era of digital world, E-Mail is a communication medium and extensively used, fast & cheap way of
message transfer over the internet world. After all, mail is not completely safe & reliable medium due to technically
alternate loopholes in protocols which able to culprits to make mistreat it especially to send spoofed E-Mails which is
recently large scale problem to handle for mail systems now days. E-Mail sender address spoofing is malicious action where
the origin address are changed and presented as it is coming from expected sender but the real sender is an assaulter. In
this paper, we present behavior of several mail applications during receiving the sender address spoofed mails. We
recommend sender spoofing analysis algorithm to check sender spoofing in mails through performing comprehensive header
evaluation on mail header fields. We generally focused on four fields like R-SPF, DKIM, DKIM Signature and DMARC.
This proposed algorithm checks the valid values of the headers. Any non valid value shows towards unauthorized mails. We
have also created data values of legitimate and spoofed mails and implemented the evaluations on mail headers for valid
and invalid values. Our proposed approach and algorithm is capable to detect sender spoofing especially sender spoofed
mails.