OmniPUSH is the safest automation tool.
What makes OmniPUSH Safe?
OmniPush runs on the Cloud using high quality dedicated proxy assigned to each Linkedin Account. This is the safest way to access Linkedin.
In addition OmniPUSH mimics real human behavior like dynamic time intervals between messages, waiting on message window, visiting profile, taking breaks, limiting number of messages/profile visits per day, etc. to ensure that it does not appear as a bot.
Choose your automation tool wisely!