Email forwarding, preventing email spoofing?

[barryt]

Hi,
I use zonedit solely for email forwarding from my personal domain (let's call it xxx.net) to my ISP (Aussiebroadband). That all works fine for a number of years.
I've seen an upsurge in return emails from 'me@xxx.net' containing spam content. I don't have any mail services on my xxx.net domain.

Would it help me to add a DMARC record to the DNS setup in zonedit to prevent my me@xxx.net address being used to send emails from spoofers??

Thanks

 

[Chris Cherry]

Hello Barryt,

You can set up an SPF record on your domain if you're using Zoneedit mailmaps.


In the TXT Record section:

Host: @
TEXT: v=spf1 include:zoneedit.com ~all

 

[barryt]

Thanks Chris. I've added that.
btw, I've also tried postmark's dmarc monitoring tool which means i also had to add a TXT record.
Host: _dmarc
TEXT: v=DMARC1; p=none; pct=100; rua=mailto:re+XXXXXXX@dmarc.postmarkapp.com; sp=none; aspf=r;

will these two entries co-exist ok?

Thanks
Barry

 

[Chris Cherry]

Yes, that is perfectly fine and a standard set up for most mail protection records.

 

[barryt]

OK, appreciate your advice. Many thanks.

 

[barryt]

Sorry to trouble you again, just thinking a bit more...
I have set my reply address in my email client (outlook) to my domain Me@xxx.net
When I send an email out from my ISP, aussiebroadband, with me@xxx.net as the reply, do I also therefore need to include Aussiebroadband.com.au in the SPF TXT record, ie v=spf1 a:zoneedit.com a:aussiebroadband.com.au -all

Thanks!

 

[Chris Cherry]

That SPF record wouldn't be advisable.

What you're specifying is that our web hosting server for zoneedit.com

zoneedit.com. 300 IN A 64.68.200.42

and

aussiebroadband.com.au. 3600 IN A 202.142.142.18

their hosting server is the only hosts able to send emails based on your domain. Neither of those servers are responsible for sending emails for your domain. I wouldn't suggest using that info.


What you might want to try is the following:

v=spf1 mx include:aussiebroadband.com.au ~all


If you have any further questions or concerns, let me know.