That's really not fine at all, the fact you're listed in blacklists is a huge problem which might be as well the root cause of all the issues.
They don't know your email is legit, since the sending IP is listed in a blacklist, they take preventive actions like this one. They do the right thing.
@Mike Somerville - The only issue I can think of, is: https://kb.mailwizz.com/articles/low-score-in-spamassassin-because-of-the-rand_mktg_header-rule/ Did you check and fixed that? What does mail-tester say? What score do you get there, because if you get a 10/10, then really there's nothing...
You can have a hidden field in your list, say PROMO_SOURCE and then when you send people on your subscription form, append that to the url, like: https://www.yourmailwizz.com/index.php/lists/1234bgstw1234/subscribe?PROMO_SOURCE=campaign1
This way, when the form is saved, your custom field will...
Unfortunately, beside export and then import, there's no better way( alternatively, from All Subscribers > Filters > Create List).
You cant do that from within the app, just by using the API, by sending the subscribers in all lists.
This is your problem:
100k is huge, MailWizz works in batches. put something like 300 or so there.
As a rule of thumb, do not change settings unless you absolutely know what you're doing, once you get more experience with MailWizz ;)
This is the expected and correct behavior. Skipping users because the campaign has been paused would not be acceptable.
For your use case, I advise simply creating a new campaign and then in the new campaign, just exclude people that received/opened the previous one, MailWizz offers you this...
I mean physically close together. If your MailWizz server is in Europe and your SMTP server is in South America, you can see how the data has to travel a long distance which takes time.
You should aim to have your MailWizz server and your SMTP server in same data center if possible, if not, at...