Es correcto, investigando un poco, no es que haya desaparecido, solo tuvo algunas mejoras:
Company - Especific SMTP Configuration
Previously, from the Mailer service in the SAP Business One Service Manager, only
one Simple Message Transfer Protocol (SMTP) server could be confiJured for the
whole SAP Business One landscape. As of SAP Business One 9.3, company-specific
SMTP servers are supported. You can configure the SMTP server for your company
by choosing the Enable Company - Especific Mailer Configuration option in:
Administration + System Initialization + General Settings + Services tab.