Anne: How many "contacts" do you have on your list. Most plans charge by the number of contacts. Some charge by the total number of contacts, some by the contacts per list (which means you pay for duplicates if a single contact is on multiple lists due to your segmentation activities). As both Ray and Gee indicated, most email service providers will meet your functional requirements. I have used MailChimp successfully but switched to ActiveCampaign because of the marketing automation...
During testing, we looked at the maximum size allowed for attached files. Most of the accounts we tested can handle between 20MB and 25MB, which is about six professional images or 10 snapshots taken with a point-and-shoot camera. It was also important for us to see a thumbnail of the file once we uploaded it, so that we could confirm we had attached the correct one.
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