Am 20.12.2023 um 11:07:16 Uhr schrieb Pocket: > Spectrum limits the number of concurrent connections from a sender, > as well as the total number of connections allowed. Limits vary based > on the reputation of the IP address. Reduce your number of > connections and try again later.
You can't fix that until you make your mail provider change those policies. The operator of the sending MTA for the Debian lists can limit the amount of connections to spectrum, talk to the postmasters there if you think the might implement that.
