January | 2013 | Linux Administrator's blog

January, 2013

AOL’s misconfigured SMTP servers bouncing emails with 521 error

Posted on:: Thursday, January 31st, 2013
Author:: shamot

We’ve fount out there is a problem with AOL SMTP servers that randomly reject emails with this hard error code: 521 5.2.1 “Service unavailable. Please try again later.” In fact this doesn’t happen very often and we may not have noticed something like that even happens if we hadn’t sent newsletters to our customers which […]

Posted in Server administration | 16 Comments »

Fixing the problem with accessing the VCenter from web after vSphere 5.0 installation

Posted on:: Wednesday, January 9th, 2013
Author:: shamot

Maybe you wonder (just like I did) why it’s not possible to manage vCenter from web browser after installing vSphere Web Client which should make this possible. After vSphere Web Client successful installation, I opened up a main vCenter web page running on https://vcenter_ip and clicked on “Log in to vSphere Web Client” which gave […]

Posted in Virtualization | 8 Comments »

January, 2013

AOL’s misconfigured SMTP servers bouncing emails with 521 error

Fixing the problem with accessing the VCenter from web after vSphere 5.0 installation

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