In that case, you migrating from an old email address to a new one is pretty easy.

在这种情况下，你迁移从旧的电子邮件地址，以一个新的方法很简单。

youdao

I'm changing my email address but for the meantime you can use the old one.

我要更换电邮地址，不过那个旧的暂时也还可以用。

《牛津词典》

During a bulk email address update, a mismatch occurred between the old and new site addressing parts of thee-mail addresses.

批量更新电子邮件地址期间，电子邮件地址中的旧站点寻址部分与新站点寻址部分不一致。

youdao