User Confirmation Emails going in "JUNK BOX"

[PAKIDIL]

hello there, i hve tried search a lot and all i got is go in vbulltein option>than send email option .i have these options with my forum .

Enable Email features? >>>Yes

Allow Users to Email Other Members >>>>YES

Use Secure Email Sending>>>>>>>>NO

Use Mailqueue System>>>>>>>>>>YES ONLY

Enable "-f" Parameter >>>>>>>>>>>>YES

SMTP Email>>>>>>>>>>>>>>>>>>>NO

SMTP Secure Connection >>>>>>>>>>>>NO

the problem is my forum user confirmation mail going in junk box and not in inbox so what should i do for this and wot option in above should i use as yes or no thanks
waiting for ur help

thanks