POP3/IMAP access periodically shut down
Access to mailbox via POP3 / IMAP and SMTP servers can automatically switch off in these cases:
- If your password was hacked and your account is being used to distribute spam. In this case, on your e-mail can come letters from "Mail Delivery System". Before you set on the settings (open the mailbox of e-mail protocols) you necessarily have to change the password secret question and answer to it.
- If you exceed the limit of sent messages per day (on Inbox service)
- Perhaps your mailbox became inactive
- If the user within two months didn’t use POP3 / IMAP protocols
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