I just set up a new relay server to scan mail for multiple school districts. First I have ever worked with Exim, so not clear how to resolve my issue. I am using Ubuntu 12.04, Exim4 from the repository and baruwa. Everything is running properly now, except the SPF portion of the Exim config is very aggressive and blocks all email that is not already rejected by the rbl rules. I have included my configs for examination on Pastebin. I worked with it some last night, which is why some portions of the config for spf have been commented out. I do want spf restrictions, but just not so overly aggresive.