On Tue, Jul 9, 2024 at 2:32 PM Ralph Seichter via mailop <mailop@mailop.org> wrote:
> * Anne P. Mitchell: > > > Receivers don't block email from new IPs by default; they block them > > when they notice something amiss with the email (be it improper > > authentication, spam complaints, or something else). > > That looks like a too generalised assessment to me. As I mentioned in a > different thread on this mailing list, my experience with Telekom / > T-Online has been that their MXs soft-block servers with unfamiliar IPs > from handing over email by default. > > One needs to contact them via a specific service address contained in > the rejection message, and have the new IP address cleared for mail > delivery to T-Online operated domains. That's not exactly in the spirit > of a free Internet, but obtaining server clearance is a matter of a few > hours only, based on my own experience with this process over the years. > It is also a once-per-IP-address thing. > > I'd say my usual experience is different, having worked with dozens of organizations moving to new Dedicated IPs for sending marketing emails, Rate limits and slow growth is usually the way to resolve these blocks. At AT&T and other mailbox providers, such as Yahoo.you need to send a trickle of email at first to their networks, fully authenticated, and of high quality (Desired emails) that are going to get good engagement from the initial users. Then you can gradually grow this number over the next several weeks. Grow to fast, or don't properly look at the MXs/domain groups associated with the network (i.e. Bellsouth, att, SBC, etc...), and you'll trigger the alerts and get blocked. These are generally temporary, so back off and wait and try again at a lower volume later. T-online has a very specific set of rules that they want senders to follow, the same thing applies to them: follow the rules, send slow and grow and you typically won't have generic problems out of the gate. Some mailbox providers appreciate a heads up to say - NEW IP coming online please be aware - and they will take steps to help you out Yahoo and Outlook are examples of this. Turning on the firehose of email is not usually the best option for new IPs regardless of the mail being sent. ~ Matt
_______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
