FortiMail is a very flexible solution easy to install and use, any organization can use it whenever they require a virtual, physical, or cloud instance. Also, it is great to have an email archiver out of the box, you do not need any external product for it. The only thing that organizations need to consider before purchasing is service bundles - with the additional cost you can get Content Disarm and Reconstruction, URL click protection, Cloud Sandboxing, etc. (included in Enterprise Advanced Threat Protection Bundle).
It has a very good feature of URL replace, it helps us to block or prevent spam, phishing, or malicious emails. It has some limitations like if some large or lengthy emails come it takes more time to scan and to avoid delay it forwards the mail to the recipient with a warning note on it.
FireEye Email Security is the most effective email security solution for protecting enterprises from APT. It is not complicated to set up and you can ride a wave of continuous security effects for a long time without major changes after the initial setup. It's automated, so users don't have to care too much about it. In addition, it provides detailed analysis data, so you can utilize it for 3rd party solutions if you want.
Any time I've had to use the support, it has been great! They always will recommend certain options, as well as explain what they do and why they are there. The support always gets back to me the same day, and are always pleasant to deal with. I never hesitate to call.
In the years we have had this service, we haven't needed much help (which is a testament to the ease of use/reliability of the product) but when we have they have been probably the best vendor I've ever dealt with when it comes to quickly addressing support call issues. We also have a very readily available engineer that has been quick to help with more complex requests.
I have used Barracuda Email Security in the past and FortiMail is just as effective. The interface is easy to use, and the configuration is straightforward in setting it up to work with Microsoft Exchange. Spam detection is effective, as well as malware/viruses and phishing attempts. Overall it is a great service.
There are a few things FireEye Email Security does better than ProofPoint and vice versa. For example, you would think blocking .html attachments would be trivial. FireEye Email Security can be configured to do it. Proofpoint can not, and if you try to configure it, HTML gets stripped from the email content, which has a major impact on the business. On the other hand, ProofPoint has a number of additional features and bells and whistles that FireEye Email Security does not.