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The main advantages of using a service like SMTP+ are higher deliverability and tracking. Let's take a closer look...
Standard SMTP vs. MailUp's SMTP+
| Regular SMTP server | MailUp's SMTP+ | |
|---|---|---|
| Deliverability | Potentially low (1) |  High |
| Statistics | None | Detailed |
| Scalability | Limited (2) | High |
| Header/footer | Must be in the message | Can be automatically added |
| Notifications (e.g. bounces) | To the sender | Customizable (e.g. sent to IT staff) |
(1) You are at the mercy of your SMTP server's reputation, which is affected by all the companies that are using it. For example, if your Web hosting company has deliverability issues, you would be negatively affected
(2) Your ISP's or Web hosting company's SMTP server is not intended for "heavy" use: it may even have volume/rate limits in place.
Higher deliverability
All emails will now go through MailUp, leveraging the system's high deliverability. Take an ecommerce Web site, for example. It typically sends emails through the Web hosting company's SMTP server. That server, however, may be used by companies that do not follow email marketing best practices, and might therefore suffer from a low reputation, with the result that emails end up in the Junk folder. Important messages such as an Order Confirmation message may never be seen by the customer. By switching to SMTP+, that online store will no longer be sending messages through the Web hosting company's SMTP server, but rather through MailUp, enjoying much higher deliverability.
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