I read through some of the threads on the 3rd party section of the forum, and have some concerns about moving forward with installation and usage of MailWizz. My client is a professional involved in a specialized field of social work, is published and highly regarded. He has started to develop and sell online training courses for social workers - I've been working closely with him to set up his websites and teach him how to record and post his videos.
He has a list of about 10,000 emails that he has collected from various associations in his field over the past few years, and has been mailing these contacts a few times a year with announcements about his field, conferences, etc. He has done it through Outlook, believe it or not, 100 contacts at a time (it takes him a while to send out an email to everyone). He's removed anyone who complained about the emails, which is apparently rare.
So his list is not permission-based, however it has been seasoned and should have low spam complaints (as long as he doesn't overdo it). However, given his list size, it would be costly to run through a traditional commercial service provider like Active Campaign or Mail Chimp etc., even if he's only mailing out once or a few times in a month. In addition, since his list is not permission-based, this would be an issue with traditional service providers. That's why I researched and purchased MailWizz.
I had thought that if we installed it on his current web host, that we could send out these emails a few times each month at very low cost, and of course, much easier than sending manually through Outlook (with good list management tools and a good email builder).
I have used Amazon SES for transactional emails for some of my own websites, not for bulk emails; I had thought that if there were any problems with sending out directly from the shared hosting that I would switch to SES. However in that thread, it sounded like SES has poor deliverability.
I am open to any advice from experienced members here regarding my situation. I want to be careful and move forward with something that will give a good experience for my client.