markwolk at gmail
Oct 26, 2006, 8:03 PM
Views: 16181
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SPF prevents mail from being delivered to Hotmail
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In the Hotmail saga, here is my latest discovery.
As we all know, Hotmail receives email very unreliably. Many
legitimate mails end up in the junk mail folder, many others simply
disappear.
Mail to Hotmail seemed to work better depending on providers used.
I.e. mails from my domains sent though ControlledMail would arrive
into Hotmail's inbox perfectly; whereas the same mails sent through
Tuffmail would end up in Hotmail's junk mail folder.
As an experiment, I have totally removed the SPF record of one of my
domains, guidedvacation.com. I waited ca 2 weeks (knowing that
Hotmails caches SPF records). And here is my experiment of today:
- mail from guidedvacation.com sent through Tuffmail arrives perfectly
in Hotmail's inbox
- mail from any other of my domains, that still have an SPF record,
sent through Tuffmail arrives in Hotmail's junk mail folder
In other terms having an SPF record is harmful if you want to send
mail to Hotmail. Removing the SPF record will improve reliability of
email delivery to Hotmail.
SPF also seems to be useless with joejob prevention. Spammers use my
SPF-protected domains more and more to send their spam. I receive
thousands of returned mails which I have never sent before, and I have
constantly to increase my filters so they don't flood my inbox. So SPF
does not seem to do the job it was designed to, and I wonder, at the
end, what is its use now?
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SPF prevents mail from being delivered to Hotmail
