Yesterday Onebox lay down, after the restoration of work, incoming mail does not work

Yesterday, due to lack of memory, the supero.crm-onebox.com box stopped loading on the server. We increased the amount of memory, rebooted the server and the work was restored. But there was one problem, incoming mail stopped coming - magazino. In this case, outgoing mail works without problems. All recommended actions have already been done: - Checked the correctness of the mail settings in the SRM - iMap, there is also access to unsafe applications, captcha was also introduced, integration was also turned off for the night. Help me figure out what could be the problem?