Reputation
224
Top tag
Next privilege 250 Rep.
View close votes
Badges
1 3 10
Impact
~20k people reached

  • 0 posts edited
  • 0 helpful flags
  • 21 votes cast
Mar
20
awarded  Popular Question
Mar
5
revised How to move a server to a new static IP address without service interruption?
edited title
Mar
4
accepted How to move a server to a new static IP address without service interruption?
Mar
4
awarded  Notable Question
Dec
18
comment Possible to configure postfix for authenticated and non-authenticated sending?
Thank you -- this was the missing puzzle piece. It looks like I can generally send email without configuring the SPF record -- so I guess many mail servers fallback to checking the MX is the SPF record is missing.
Dec
18
comment Possible to configure postfix for authenticated and non-authenticated sending?
How then does the receiving email server verify that email From:xxx@example.com is actually from the owner of example.com. If email comes from some IP address and the IP address doesn't match the resolved IP address of example.com's MX record then the email is rejected by the sending server. This is the behavior I see in practice, and it seems reasonable and prevent spoofing the To field of emails.
Dec
12
comment Possible to configure postfix for authenticated and non-authenticated sending?
"To verify that the sending server is an authorized email server, the receiving email server tries to find an MX record that correlates to the sender’s domain. If it cannot find one, it assumes that the email is spam and rejects it." watchguard.com/help/docs/wsm/xtm_11/en-US/…
Dec
10
comment Possible to configure postfix for authenticated and non-authenticated sending?
The final destination is GApps. The postfix server needs to forward mail to the GApps server. Both GApps and the postfix server can send mail from example.com. As a result I think I need to register both servers in the MX record. Although the postfix server is not the desired destination for incoming mail, I believe it needs to be registered in the MX record so that servers it sends mail to can verify that the *@example.com From and ReplyTo header match the senders IP in the MX records for example.com. Its possible to register multiple MX records, correct?
Dec
10
asked Possible to configure postfix for authenticated and non-authenticated sending?
Oct
21
comment How to map multiple AWS LoadBalancer ports to a single instance port?
Nope. That was it. Thank you.
Oct
21
revised How to map multiple AWS LoadBalancer ports to a single instance port?
deleted 24 characters in body
Oct
21
comment How to map multiple AWS LoadBalancer ports to a single instance port?
My bad. Problems still persists though. Updating the question.
Oct
21
asked How to map multiple AWS LoadBalancer ports to a single instance port?
Oct
10
comment How to create a local apt package proxy?
This is exactly the right thing.
Oct
10
accepted How to create a local apt package proxy?
Oct
10
asked How to create a local apt package proxy?
Sep
14
awarded  Famous Question
Jul
2
asked Possible to use nfs-client in VM with non-bridged network adapter?
Jul
2
revised nfs client in vmware: access denied by server?
deleted 4 characters in body; edited title
Jul
2
asked nfs client in vmware: access denied by server?