We study whether caste identity shapes faculty engagement with student outreach in Indian higher education, the interaction through which students access mentorship, references, and research opportunities. In a preregistered natural field experiment with 7,285 professors, we test for caste-based differential treatment at three levels. At the level of observable taste-based discrimination, professors engage equally with email requests from otherwise comparable Reserved Caste (RC) and Unreserved Caste (URC) students, with confidence intervals ruling out caste effects exceeding 11 percent of the mean. Neither task complexity, financial incentives, professor gender, nor STEM affiliation moderates this null. At the level of implicit attention, however, RC emails receive significantly less deliberation, measured by repeated opens, and this gap widens rather than narrows with financial incentives. This counter-Becker pattern points away from taste-based discrimination toward an attentional account in which RC names attract less sustained consideration even when engagement is equalized. At the level of pro-inclusion beliefs, exploratory evidence reveals a behavioral-attitudinal divergence within STEM faculty, who engage more readily with student outreach yet hold substantially less pro-inclusion attitudes than non-STEM faculty. Caste inequality in Indian higher education thus operates through subtler implicit and attitudinal channels than overt differential engagement, with implications for anti-discrimination policies that should target not only observable behavior but also the underlying attitudes that sustain it.