wildbit/postmark-gem — comment on commit ee7a0d62b7662f3084306cd635b3cc97c0d67a4c
File: lib/postmark.rb line 106
By bensie:

BCC should not assume an array either -- perfectly reasonable for a single BCC to be provided:

```ruby
options["Bcc"] = Array[message.bcc].join(", ") if message.bcc
```