Very likely the SMTP provider (in your example company.com) has SPF setup. Which is a good and beautiful thing.
What is SPF? "Sender Policy Framework (SPF) is a simple email-validation system designed to detect email spoofing by providing a mechanism to allow receiving mail exchangers to check that incoming mail from a domain comes from a host authorized by that domain's administrators"
In your case, the originator (From) is "glpi@company.com" and the host/domain that send the email is "server30.company.local". Then the policy kick in and said, hey "server30.company.local" is not permitted/allow to send email on behalf of "company.com". Failed it. You might need to contact the Administrator to allow the "server30.company.local" domain to use "company.com" SMTP to send email.
Sender Policy Framework - Wikipedia[
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How to update/set SPF
Set up SPF in Office 365 to help prevent spoofing: Exchange Online Help[
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Add an SPF record | Domains - GoDaddy Help CA[
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