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Apr
19
awarded  Popular Question
Nov
5
accepted How does SPF reduce backscatter with a Google Apps account
Nov
5
accepted Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers
Nov
5
comment How does SPF reduce backscatter with a Google Apps account
Regarding the ~all, I had reservations, but Google recommends using it. Just a few minutes ago, on a related question, the author to one of the answers (serverfault.com/a/550859/32522) confirmed I don't need to use ~all. That resonates with your feedback. As for the question I asked, your answer confirms that SPF by itself doesn't really prevent the scenario I mentioned. I wanted to clarify that for myself. I suppose Google must have implemented safe guards. Thanks!
Nov
5
comment Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers
Ok. One last thing. My VPS's ip doesn't need to be in that SPF entry, right? I don't host an SMTP server. It's just that googling the original error message led me to believe I need to include it and set up a Reverse DNS entry and all that. I may have misread that. Could you confirm I don't need to add the vps ip addresses?
Nov
5
comment Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers
Just to clarify, if only using Gmail smtp, then I can use -all. There isn't a chance that the ip's returned by _spf.google.com might not contain the ip of the smtp server used. I got the impression that they dynamically create servers and associate ip's, so some might get left out for a very short duration.
Nov
5
comment Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers
If MX records are meant to be incoming only, then that would explain things a bit. How about the ~all at the end? Google recommends it. Doesn't that "reduce" the effectiveness of the SPF entry
Nov
5
asked How does SPF reduce backscatter with a Google Apps account
Nov
5
comment Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers
That's what even I think. But why didn't the MX mechanism work? The spec says it should allow all servers handling the domain's email.
Nov
5
asked Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers
Sep
12
awarded  Editor
Sep
12
awarded  Scholar
Sep
12
accepted Diagnose why server went down
Sep
12
revised Diagnose why server went down
added 303 characters in body
Sep
12
comment Diagnose why server went down
The host later posted an update saying they had to restart the physical server due to an emergency. This current downtime was their fault. I will look into Asp.net health monitoring. Thanks for you answer.
Sep
12
comment Diagnose why server went down
After the downtime was over, the host posted an update mentioning they had rebooted physical server (some emergency it seems) which causes the virtual machines to be down for 30 mins. Seems there was some confusion as to which physical server my vps was on. Silly. ... Thank you for your answer.
Sep
11
comment Diagnose why server went down
We don't have a "managed vps" service with them. Meaning they give us none to very basic stats. When contacted they responded that they didn't do anything and from their end the VPS was running :(
Sep
11
awarded  Student
Sep
11
asked Diagnose why server went down
Apr
22
comment Heroku suggests avoiding naked domain a-records. Need help understanding it
I understand the rationale behind doing this. My question is, for a certain duration of time, ie while the old ip 1.1.1.1 is cached by the resolvers, the users still endup going to the old ip. Certain proxies/browsers might not respect the TTL and still resolve to the old ip. I am trying to understand if Heroku is able to bypass this somehow, or this is considered acceptable.