I see lots of similar comments
Bigfoot tend to say, it is your ISP blocking them wrongly as sending spam
The ISP generally says it is a misconfiguration at Bigfoot
Unfortunately your ISP has a very bad reputation for customer service & support and their anti-spam filters quite frankly stink. They either block completely genuine, good mail or let all the junk & crud through
I really don't have an answer for you except to say contact or try to contact your ISP & see what they say
Bigfoot tend to say, it is your ISP blocking them wrongly as sending spam
The ISP generally says it is a misconfiguration at Bigfoot
Unfortunately your ISP has a very bad reputation for customer service & support and their anti-spam filters quite frankly stink. They either block completely genuine, good mail or let all the junk & crud through
I really don't have an answer for you except to say contact or try to contact your ISP & see what they say