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First mention whether you've plumbed Mail::DKIM into your MTA to sign messages or the sending MTA is using some other DKIM signing system, like OpenDKIM.
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First mention whether you've plumbed Mail::DKIM into your MTA to sign messages or the sending MTA is using some other DKIM signing system, like OpenDKIM.

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We are piping the EML file directly to the script.
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We are piping the EML file directly to the script.

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I'll ask another way.<br />
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Say whether you signed the incoming email message + if you did, say whether you use Mail::DKIM or OpenDKIM or some other mechanism to sign the message.<br />
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Also, attach one of the messages as a text attachment, including all headers.<br />
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Also, attach your entire script, which should roughly be laid out to match the <u><a href="https://metacpan.org/pod/Mail::DKIM::Verifier" rel="ugc">https://metacpan.org/pod/Mail::DKIM::Verifier</a></u> docs.
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I'll ask another way.

Say whether you signed the incoming email message + if you did, say whether you use Mail::DKIM or OpenDKIM or some other mechanism to sign the message.

Also, attach one of the messages as a text attachment, including all headers.

Also, attach your entire script, which should roughly be laid out to match the https://metacpan.org/pod/Mail::DKIM::Verifier [https://metacpan.org/pod/Mail::DKIM::Verifier] docs.

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I am using Mail::DKIM Verifier tool. I am having problems verifying the DKIM signature. The BH is correct, however the B= part of the signature seems to not be validating. Does anyone know how to get the Perl Script to output what the signature is supposed to be vs what it is?
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I am using Mail::DKIM Verifier tool. I am having problems verifying the DKIM signature. The BH is correct, however the B= part of the signature seems to not be validating. Does anyone know how to get the Perl Script to output what the signature is supposed to be vs what it is?

DKIM Signature is Failing Verification bh is verified, however b= is not

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Perl is a high-level, general-purpose, interpreted, dynamic programming languages with over 25 years of development. Perl 5 runs on over 100 platforms from portables to mainframes and is suitable for both rapid prototyping and large-scale development projects.  Perl gained widespread popularity as a Common Gateway Interface (CGI) scripting language, in part due to its regular expression and string parsing abilities. In addition to CGI, Perl is used for graphics programming, system administration, network programming, finance, bioinformatics, and other applications.