The ornamental design for a mailboxshield, as shown and described.
FIG. 1 is a perspective view of a mailbox shield, showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is another perspective view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a first side elevational view thereof, shown adjacent to a mailbox in broken lines;
FIG. 7 is a second side elevational view thereof, shown adjacent to a mailbox in broken lines;
FIG. 8 is a top plan view thereof; and,
FIG. 9 is a bottom plan view thereof.
The even broken lines embraced by a bracket on the poles of the mailbox shield in FIGS. 1-7 are shown broken away to indicate that no particular length is claimed. The even broken lines showing a mailbox in FIGS. 6 and 7 are included for the purpose of illustrating environment, and form no part of the claimed design.