I’m trying to understand all this and every time I think I get it, someone
describes something to me and I get all flustered once again.
I have a client that has their email server hosted in their office on an
exchange email server(mail.company.com), that is sitting on a dsl line
provided by mpower. Their domain(HYPERLINK
"http://www.company.com/"www.company.com) is hosted by a different hosting
company so their dns records are stored there. All of their mail is sent out
of their office from the exchange server via mpower. Their leased static IP
address from mpower is 208.57.82.4, which is set in their dns records on the
hosting company(216.70.246.2) to point to their MX record(mail.company.com).
Currently a reverse dns inquiry shows that the IP address 208.57.52.4 is as
follows: 208.57.82.4 PTR record: san-cust-208.57.82.4.mpowercom.net. [TTL
604800s] [A=208.57.82.4]
This is what I’m thinking I need to do. 1) Call mpower and ask them to
create a PTR record to point back to mail.company.com and then I’m confused
as to where I need to put this SPF record; in their dns records at the
hosting company or in the dns records on the exchange server in their
office. Whose benefit is the SPF record supplying? I’m not sure where the
SPF record comes into play, when mail is sent or received?
Thanks for clearing this up for me. I feel lost with this new feature, but
really want to understand it because I think it will put a big dent in spam.
Jeff
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.766 / Virus Database: 513 - Release Date: 9/17/2004
-------
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describes something to me and I get all flustered once again.
I have a client that has their email server hosted in their office on an
exchange email server(mail.company.com), that is sitting on a dsl line
provided by mpower. Their domain(HYPERLINK
"http://www.company.com/"www.company.com) is hosted by a different hosting
company so their dns records are stored there. All of their mail is sent out
of their office from the exchange server via mpower. Their leased static IP
address from mpower is 208.57.82.4, which is set in their dns records on the
hosting company(216.70.246.2) to point to their MX record(mail.company.com).
Currently a reverse dns inquiry shows that the IP address 208.57.52.4 is as
follows: 208.57.82.4 PTR record: san-cust-208.57.82.4.mpowercom.net. [TTL
604800s] [A=208.57.82.4]
This is what I’m thinking I need to do. 1) Call mpower and ask them to
create a PTR record to point back to mail.company.com and then I’m confused
as to where I need to put this SPF record; in their dns records at the
hosting company or in the dns records on the exchange server in their
office. Whose benefit is the SPF record supplying? I’m not sure where the
SPF record comes into play, when mail is sent or received?
Thanks for clearing this up for me. I feel lost with this new feature, but
really want to understand it because I think it will put a big dent in spam.
Jeff
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.766 / Virus Database: 513 - Release Date: 9/17/2004
-------
Archives at http://archives.listbox.com/spf-help/current/
Donate! http://spf.pobox.com/donations.html
To unsubscribe, change your address, or temporarily deactivate your subscription,
please go to http://v2.listbox.com/member/?listname=spf-help@v2.listbox.com