Field network testing
Lab and manufacturing testing
Adaptive service assurance platform
Academic and research institutions
Adaptive service assurance solutions
Cable MSO (multiple system operator)
Communications service providers
Network equipment manufacturers
Webscale companies and data centers
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An Internet standard for electronic mail transmission across IP networks. SMTP was first defined by RFC 821 and last updated by RFC 5321, which includes the extended SMTP (ESMTP) additions.
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