The time is running out and we I'm preparing the last flash sales email for my client. Would Mailchimp work the best or there is alternative solutions? I don't have the evidence, but I "feel" Mailchimp doesn't send all emails and the delivery rate is not really high as I expect to get...
I use email as well, mostly to connect with clients. I also installed https://voiptimecloud.com/inside-sales-software to know more about customers and to satisfy their needs. Our customers are the most important thing in business, so we must take care about them.
I personally like this one https://www.sendinblue.com because the cost is less, but the quality is not high comparing with Mailchimp or GetResponse. They have convenient cost / email calculator so you can easily see the price you will have to pay https://www.sendinblue.com/mailchimp/
However, looking from the strategy point of view I'll divide the list to two parts. If the list is big enough, so you can import the first list in the GetResponse for example, and the second in SendInBlue service.
Hope it helps,