Ответ

ответ был таким
Delivery to the following recipient failed permanently:
info@seven-sky.net
Technical details of permanent failure:
Your email to group info@seven-sky.net was rejected due to spam classification. To address this issue:
* Contact the owner of the group, who can choose to enable message moderation instead of bouncing these emails.
* Set up SPF records for your sending domain if you have not done so already.
Instructions for both steps can be found here: https://support.google.com/a/answer/168383.
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From: =?UTF-8?B?0JLRj9GH0LXRgdC70LDQsiDQktC+0LvQutC+0LI=?= <legion7431@mail.ru>
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С уважением,
Алдошина А.Н.
legion7431@mail.ru

Здравствуйте.
Заявление передано в отдел расчетов. Смена тарифного плана будет произведена в течении рабочего дня.
Сервис поддержки клиентов работает на платформе UserEcho
Смена тарифного плана произведена.
Приятного пользования.