1. You should use Private Domain Mail filtering and sorting software to send mail. Inbox rate will be very high. If you don't have the software, you can buy "Private Domain Sorting and Filtering Software" from us or hire us to filter and sort for you.

2. Once you have purchased SMTP, we will not allow refund or exchange if you feel that SMTP is not good. Because the IP server we provide you is Private & Clear IP & New Domain.
Maybe the SMTP Server when you test it doesn't deliver with your Domain Mail. However, in our experience, up to 20 to 30% of the Domain Mail in your Email list is Private Domain Mail with a weak firewall. 20% to 30% of all emails sent to Unlimited is quite a large number. We recommend that you don't jump around and don't use SMTP. That hurts both. You lose money when you buy SMTP that you don't use. We lose customers because of their ignorance.

For example, you send 1,000,000 emails in a day. With the rate of 10% - 30% Unlimited SMTP sends emails to the inbox. So the number of emails sent to the inbox is still high from 100,000 to 300,000 emails. That still works.

3. UNLIMITED SMTP DEDICATED SERVER ( NEW & FRESH - PRIVATE & IP CLEAR ) should only send Email lists as Private Domain Mail. If you send mass emails with email lists of free email services of Gmail, Yahoo, Outlook, AOL...etc. In our experience sending mass emails with those emails has little effect because Google Yahoo Microsoft has an anti-spam system, a system that detects malicious mail content.
To send effective mass email with Gmail, Yahoo, Outlook, AOL you must have a reasonable email sending method, reasonable email sending speed, message content is legit, SMTP domain has high reliability.