Our company is sending out a lot of emails per day and planning to send even more in future. (thousands) Also there are mass mailouts as well in the ten thousands every now and then.
Anybody has experience with hotmail, yahoo (web.de, gmx.net) and similar webmail companies blocking your emails because "too many from the same source in a period of time" have been sent to them?
What can be done about it? Spreading email mailouts over a whole day/night? At what rate?
(we are talking about legal emailing just to make sure...)