Welcome to the forums,
You're admin can set zmprov ma
user@domain.com zimbraSpamApplyUserFilters to TRUE for you (which will allow the mail to be affected by personal filters, rather than direct to junk folder - things that don't match a rule and are above the threshold will still land in junk).
Or if you really want to go all out:
zmprov ma
user@domain.com +amavisSpamLover TRUE +amavisBypassSpamChecks TRUE +amavisBannedFilesLover TRUE +amavisBypassVirusChecks TRUE