I have been using the Specify by host option of the Internet Mail Service to block e-mail from specific mail servers. Lately, though, I have been experiencing problems receiving e-mail through the IMC. When the problem arises, I have to restart the Internet mail service. Sometimes, though, I have to restart the IMC several times before e-mail begins to flow. Does having too many entries in the Specify by host list slow down or stop the operation of the IMC?