You can send messages to LinkedIn members who aren’t your 1st degree connections using InMail messages in LinkedIn Recruiter Lite.
Additional InMail credits
Your Purchaser Admin can purchase additional InMail credits in packs of 10, with a maximum of 70 additional InMails purchased per seat. Your contract cannot exceed 120 InMails per seat.
InMail credits by billing cycle
InMail credits purchased in addition to your monthly allotment never expire, but the number of InMails in your Recruiter Lite account won't exceed 120 InMails per seat when your billing cycle renews. This means if you have one seat and 115 InMails remaining when your billing cycle renews, you'll only receive 5 InMails for your monthly allotment and the remaining 25 InMails will be skipped and be non-recoverable. You must have a total of 30 InMail credits available per seat to receive the full monthly allotment when your billing cycle renews.