Yes, even gmail goes away sometimes (and you dont even really notice it).
To most folks gmail meets the near 100% uptime and for freemail services is the top dog. I just want to remind folks that even the best take a few seconds off from time to time.
Aug 27 20:40:58 XXXXqmail: 1377650458.833799 delivery 10985: deferral: 173.194.77.26_failed_after_I_sent_the_message./Remote_host_said:_421_4.7.0_Temporary_System_Problem.__Try_again_later_(MU)._w5si2150276obn.152_-_gsmtp/
Why did I post this ? Because after a decade at a ISP and hearing “well my gmail never goes down” this log message made me smile a little :) Now lets get back to  enjoying our 99.9999% uptimes!