Email services typically charge between $2 and $10 per month for their paid services, depending on how much mail you need to send and receive. The biggest differences between free and paid email services is the size of the files you’re allowed to attach to outgoing mail, how many emails you can send per day, how much backup and inbox space you’re given, and the level of customer support you can access. Most free email services give you enough inbox and online backup space combined to hold hundreds of thousands of emails, but they typically limit the number of email messages you can send in a day to about 100. This is plenty for most people using an email account for personal use. But if you have a home business or know a lot of people you need to email every day, then it may be worth purchasing an email account with unlimited outbound messaging.
Most companies offer tutorials and support for their services. Using the trial version of each program, we evaluated layouts and looked for things that would make the platform user-friendly. For example, are the icons easily identifiable? Is it apparent where to go to begin to build a survey and distribute surveys to users? How easy is it to create or change a survey? We found that the best survey builders allow you to quickly edit questions and rearrange the order of your survey without many additional steps. 
For example, if you set up an autoresponder with an interval of 24 and you receive an email from at 8:00 AM on Monday, the autoresponder immediately responds to the message. If, however, continues to email you throughout the day, the autoresponder does not send another response for 24 hours after the initial email (in this case, 8:00 AM on Tuesday). If emails you again after the 24-hour interval expires, the system sends them an autoresponse.
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.
CleverReach is an email marketing tool that uses a drag and drop newsletter editor to help users design emails. The company also provides data on how the email marketing campaigns are doing in addition to the ability to design the campaigns. CleverReach offers a free option, which can send up to 10,000 emails a month to 2,500 recipients for businesses with small email subscriber lists, or those looking to try out the product.
Robly's OpenGen technology utilizes a traditional email campaign process; however, OpenGen then resends your campaign one to 10 days later, with a different subject line to those subscribers who didn't open the first campaign. The system sends emails one at a time, at the moment subscribers are most likely to check their inboxes. The service features A/B testing, a pop-up widget to increase contacts and mobile-responsive templates.