The Collaborative International Dictionary of English v.0.48:

Mailed \Mailed\, a. (Zool.)
   Protected by an external coat, or covering, of scales or
   plates.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mailed \Mailed\, a. [See 1st Mail.]
   Spotted; speckled.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mail \Mail\, v. t. [imp. & p. p. Mailed; p. pr. & vb. n.
   Mailing.]
   To deliver into the custody of the postoffice officials, or
   place in a government letter box, for transmission by mail;
   to post; as, to mail a letter. [U. S.]
   [1913 Webster]

   Note: In the United States to mail and to post are both in
         common use; as, to mail or post a letter. In England
         post is the commoner usage.
         [1913 Webster]

WordNet (r) 3.0 (2006):

mailed
    adj 1: wearing protective mail [syn: mail-clad, mailed]