When it fails to deliver the message to the destined inbox, it sends a message to your inbox stating the failure and its cause. Usually, these messages come from an address that looks like this -mailer-daemon@xyzcompany.com. Here is how a message from mail delivery subsystem looks like. ...
In the 80s, the Sendmail a mailer daemon project developed by Eric Allman required a logging solution. This is how Syslog was born. It was rapidly adopted by other applications in the Unix-like ecosystem and became a standard. Btw – at Sematext we do support Syslog format with Sematext ...
and builds a new HashMap containing only the cache entries which have not expired. This is bound to take a lot of procesisng power, and it’s also what’s causing the creation of all those ‘new’ objects we are garbage