Algorithms 'filtering' by the day improved and become more complicated, and the 'leak' through the filters 'civil' correspondence becomes more difficult. The first risk area is the inner content of mail is a topic and global concerns not only the mass mailing. This problem – the number one! Number – two: The server is being Newsletter! Mail servers pride themselves on their 'perfect' spam protection, such as Yandex, Mail.Pu, Rambler easily compute server which comes prohibitively large number of letters, and can be easily 'cut' IP block in their input. Number – three, power email hosting! Not all sites will be hosting is measured by the sending of your site. Most of them are starting to reboot for the abundance of outgoing mail, without fail, informed of their discontent, and in the form of a rigid and does not require discussion. Accordingly, the pre-limit is to address issues sending mail, the service support for your hosting provider. For example, support 'Space Web' I replied that they had no limit is set, but just in case of endurance, I checked out the site … (result later) So, composing only 'problem' 1 and 2, we can determine the percentage of filtering our mail, 30 – 35 %.

C risk of certain losses may be the case is measured by sending you news, online newspaper, a magazine, but when it comes to e-commerce, and your recipient is a regular buyer waiting for the new bids from you … The conclusion, I think, begs itself – use the services of a professional service that will take over responsibility for guaranteed delivery of your correspondence. Most sharpened for this service, I think Max smartresponder.ru Heeger. A huge advantage of this service is that the author is not burdened with conditions on the regularity of distribution. Lish must pass a simple registration process and the author gets the full freedom of their mailings, and for a free account 'SmartResponder.FREE' has its limitations so small that they can not be a problem for the conduct of serious distribution.