MailChimp subscription emails caught by junk filters

[xecutable]

I have recently started to build a mailing list, and decided to go for now with the free alternative of aweber, mailchimp. However, a lot of the confirmation letters from what I can see are getting junked.

I am using their default letter which is quite short and clear of spammy words or images. Any idea what must be done?

P.S: Just checked the mail server in the blacklist seems like there's 1 match of being blacklisted.