Why did this start happening? I got 2 emails today that have a similar error message. .I received other email without this error.
Processing errors occurred during delivery:
Recipient address (it has my verizon email address correctly)
Reason: Error in sieve filter: Insufficient arguments in call to function: header around input line 5 [(h eader:c ontains[ ^"X-Verizon-Spam"][""]
Delivery processing continued in spite of these errors.