Mailing list marketing emails!

Hi guys. I’ve set up my mailing list options of the responsive theme and tested it and it works perfectly.

Now I want to start using it to send marketing emails to my potential subscribers. I’ll basically place a banner at the top of each email of the merchant and underneath that I’ll write some text (e.g. coupon codes, special occasions deals, etc.) or I’ll place a number of merchant logos and ask my audience to check the deals available. I have all the banners from my affiliate network in html and javascript, but when I place the javascript code to the mailing list it either disappears (on a computer) or shows only the top quarter of the banner (on mobile).

Is the theme’s mailing list capable of doing this? How?

I’ve searched the forums and found this https://www.premiumpress.com/forums/topic/mass-emailer-need-help/ but since I’m just starting the mailing list with a less than 50 subscribers I would prefer to use the theme mailing list.

Any suggestions would be helpful