1621058650.vac Official

Ipswitch IMail Server uses .vac files to store vacation auto-response messages.

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An older computer algebra toolkit that uses the format for complex polynomial arithmetic . Ipswitch IMail Server uses

An audio driver utility that bridges audio applications often creates or uses .vac files. 1621058650.vac

A deep dive into what happened on May 15, 2021, and why someone might have archived it in a .vac format.