You may get trouble when sending bulk of marketing emails, though the receivers are absolutely your opt-in subscribers. Most of your emails are sent, but blocked by mail servers due to anti-spam protection.
Email delivery platform helps your emails to opt-in receivers effectively, who has strong credit in email communication and keeps solid relationship with email service providers.
Those email delivery platforms are somewhat online payment platforms like PayPal, AliPay, to establish a bridge between 2 parts in B2B or B2C.
Major Platforms in China for Your Email Delivery
Advantages and Disadvantages
You increase success rate of email delivery through those platforms, while you have to pay for the service. Sometimes, it's inexpensive for most small B2B business, as receivers are no more than 10K.
Whether you use the platform or not, depends strongly on your situation, quantity of receivers and budget you have. Anyway, the performance of email marketing should be your first concerns.
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