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 Setting a SPF record to minimize spam.
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tribaliztic
Senior Member

Sweden
1532 Posts

Posted - 21 November 2005 :  09:00:53  Show Profile  Visit tribaliztic's Homepage  Send tribaliztic an ICQ Message
I've recently noticed that alot of spam is sent with my domains as sender. I was told that one way to minimize this is to set up a SPF record. From what I've read this must be set at the DNS, am I right?

More info: http://www.openspf.org

/Tribaliztic
- www.gotlandrace.se -

Podge
Support Moderator

Ireland
3776 Posts

Posted - 21 November 2005 :  09:14:06  Show Profile  Send Podge an ICQ Message  Send Podge a Yahoo! Message
Yes. You create a "text" dns entry containing the i.p. address(es) of those mail servers which are allowed to send mail on your domains behalf.

You can use this to check if its correct - http://www.dnsreport.com/
SPF is fourth from the bottom of the table.

Podge.

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tribaliztic
Senior Member

Sweden
1532 Posts

Posted - 21 November 2005 :  09:23:54  Show Profile  Visit tribaliztic's Homepage  Send tribaliztic an ICQ Message
Hm.. I have a web interface on my dns "host" where I set up my dns stuff. Do I just put in the string I got from openspf.org there?

I've tested dnsreport and it says I'm ok (you can try it with gotlandrace.com as domain) but my catch-all-account is drowning in error mails, approx 600/day. I don't think the mails are sent via my server, but I really want this to end...

/Tribaliztic
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Podge
Support Moderator

Ireland
3776 Posts

Posted - 21 November 2005 :  13:30:26  Show Profile  Send Podge an ICQ Message  Send Podge a Yahoo! Message
The spf record hasn't been setup for gotlandrace.com yet according to DnsReport. Your host should be able to add this record for you if there is no provision for it in the web interface. You need to create a new "Text" record.

My opinion of a catch-all account is that its a disaster waiting to happen. If the sender or reply-to addresses (presumably of your domain) are not valid I believe the safest thing is to delete them or not accept them at all. A lot of virii (viruses) come disguised as "Mail Delivery Failure" errors.

On a related note: Has anyone implemented this anti-spam api - http://antispam.yahoo.com/domainkeys

Podge.

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tribaliztic
Senior Member

Sweden
1532 Posts

Posted - 21 November 2005 :  17:41:30  Show Profile  Visit tribaliztic's Homepage  Send tribaliztic an ICQ Message
Ok, so you suggest I shut down the catch-all-account? I thought it was a good idea to be able to see mail that was sent to the wrong account..
Maybe that's the way to go =)
No SPF Record is set up yet, I'll contact my host and see if they can fix it (I doubt it...).
Thanks =)

/Tribaliztic
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Podge
Support Moderator

Ireland
3776 Posts

Posted - 21 November 2005 :  17:46:22  Show Profile  Send Podge an ICQ Message  Send Podge a Yahoo! Message
I haven't shut mine off yet. I'm a bit undecided.

Adding a Text dns record is easy enough but you probably will need access to the server to do it. I can provide step by step instructions if your host needs it.

Podge.

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tribaliztic
Senior Member

Sweden
1532 Posts

Posted - 22 November 2005 :  02:55:32  Show Profile  Visit tribaliztic's Homepage  Send tribaliztic an ICQ Message
They will sure need it, they are n00bs =)
I've had SO much problems with them so I got my own server...
Haven't gotten any reply on my inquiry to them, but I'll keep you posted =)

/Tribaliztic
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pdrg
Support Moderator

United Kingdom
2897 Posts

Posted - 22 November 2005 :  03:53:04  Show Profile  Send pdrg a Yahoo! Message
Here's what I've just done as I was getting sick of all the spam in my catchall

Send all email through a gmail account, which will spam-filter for you. Gmail then allows you to POP3 into your Gmail mailbox, and you have spam-stripped mails, but can still periodically look in gmail to see if it mislabelled any non-spam as spam (30-day auto-retention of spam mails). If someone sends you mail to pdgr@ instead of pdrg@ (as I sometimes get) then as long as the mail body doesn't look like spam, it gets through top your gmail account inbox, and you just pick it up with pop3 in Outlook as you (well, I) normally do, so you can still have it coming to the same inbox, just via the pretty route.

hth
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tribaliztic
Senior Member

Sweden
1532 Posts

Posted - 22 November 2005 :  08:10:59  Show Profile  Visit tribaliztic's Homepage  Send tribaliztic an ICQ Message
cool! But don't gmail blacklist you after awhile? =)

My domain host don't support SPF records, as I said, they are n00bs =(

/Tribaliztic
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Podge
Support Moderator

Ireland
3776 Posts

Posted - 22 November 2005 :  08:22:02  Show Profile  Send Podge an ICQ Message  Send Podge a Yahoo! Message
If you have your own server you can install MSDNS and host your own dns server. All you need is two i.p. addresses for your name servers.

Podge.

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tribaliztic
Senior Member

Sweden
1532 Posts

Posted - 22 November 2005 :  08:34:38  Show Profile  Visit tribaliztic's Homepage  Send tribaliztic an ICQ Message
I only have on IP =/

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pdrg
Support Moderator

United Kingdom
2897 Posts

Posted - 23 November 2005 :  10:36:19  Show Profile  Send pdrg a Yahoo! Message
quote:
Originally posted by tribaliztic

cool! But don't gmail blacklist you after awhile? =)


Do they? Guess I'd better use their UI a while to keep them sweet, but I don't see what I'd be doing against the rules here - just having my email come throuhg their service, just like they ask!
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-gary
Development Team Member

406 Posts

Posted - 23 November 2005 :  11:39:10  Show Profile
Set up your own DNS if you own the domain name and have access to change the DNS records. I've used http://zoneedit.com for the last 4 or 5 years and have only had maybe 30 hours of outage. Free for 5 domains.

Just know that hardly anyone supports SPF and it has major drawbacks when it comes to store and forward systems. Your best bet is to dump the catch-all and don't use emails like sales@ or info@, or it will never end.

KawiForums.com


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tribaliztic
Senior Member

Sweden
1532 Posts

Posted - 24 November 2005 :  00:44:22  Show Profile  Visit tribaliztic's Homepage  Send tribaliztic an ICQ Message
I've dumped the catch-all-account =)

pdrg: won't it look like it's your server that's sending all spam if you forward all mails to gmail? If so, they'll probably be p-ssed on you and blacklist your server soon?

/Tribaliztic
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