unsolicited

un- +‎ solicited

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unsolicited (comparative more unsolicited, superlative most unsolicited)

1. Not requested, welcome or invited.
   • 2013 May 25, “No hiding place”, in The Economist‎, volume 407, number 8837, page 74:

     In America alone, people spent $170 billion on “direct marketing”—junk mail of both the physical and electronic varieties—last year. Yet of those who received unsolicited adverts through the post, only 3% bought anything as a result.

   People have become very frustrated with unsolicited sales calls.

• solicited