Telstra Replacing Bigpond email services with Telstra Mail. If you are a Telstra customer with a BigPond account then this video may be of interest to you. Telstra has been migrating BigPond email customers to their new Telstra Mail system since May but in recent weeks we have been receiving lots of questions as to why BigPond email has stopped working for some of you. Because you receive so many emails sometimes you don't read them thoroughly. Other times you read them but don't understand them