Something that has changed in the mail service. Plus there were reports that some time the mail was not working.
https://2.downloader.disk.yandex.ru/preview/a6b9a00d2fe074e33dbb95955fa597ef609efc0b307fa9c104e6113ac8049cb3/inf/BkS0b6mWXoViCbWB0VxahriE_NXWT2OjX57P0OkVkX5IAbcZybQroaHjGPbb0s_hvtWOAzPD7VfuwJ_UkcsWcg%3D%3D?uid=0&filename=2017-04-26_15-33-23.jpg&disposition=inline&hash=&limit=0&content_type=image%2Fjpeg&tknv=v2&size=XXL&crop=0
How did you get that?
Open the interface of your mail and check the correspondence. There everything is seen that the ip has changed.
21.04 screen of e-mail
https://yadi.sk/i/oMBcD24V3HNkxJ
26.04 screen of e-mail
https://yadi.sk/i/eQ7fdoJN3HNkxS