ESOCKETTIMEDOUT error more than one attachments to smart transactional email

[jonathanredford]

I'm trying to attach two PDFs to a smart transaction email. Sending with a single attachments works fine but with two, I get the error ESOCKETTIMEDOUT

Both PDFs that I am including in the attachments array send fine on their own so it's not a file format issue.

Using latest version of this package 0.8.2