We had technical issues earlier this morning with our backend infrastructure which made the service inaccessible for some users. We have now restored services for all applications except for ProtonMail Bridge, and we are working on restoring services for Bridge as soon as possible. All emails sent or received have been queued and no data was lost, although there may be some delays in email delivery. We apologize for the inconvenience and will be making additional changes to prevent this type of issue in the future.