LYNN-Hostile tribes, sleet and hail usually aren’t enough to deter delivery of the U.S. mail, but bees are another matter.”Bee stings can be very painful,” said Lynn Postmaster John P. Meuse, reminding customers that letter carriers often face airborne threats. “Our letter carriers want to provide the best service possible to customers. At the same time, they should not be subject to situations that endanger them. That’s why we ask customers to restrain their dogs during mail delivery times and why I am now reminding residents that bees also present dangerous situations.”Meuse asked customers to keep bees from settling in or near mailboxes and to be especially vigilant if they have flowers in the general vicinity of mail receptacles.According to Meuse, if swarms of bees hover near flowers, trees or shrubs, it’s possible a nest is nearby. He urged customers to take caution when dealing with bees and wasps, adding that Lynn-based letter carriers would be “most appreciative” if these hazards were removed.”Bees and wasps can inflict pain and suffering on our employees, and for those allergic to bee venom, the sting can prove fatal,” he said, noting some bees inflict multiple stings.