Hello,
Matthias Hertzog wrote:
Hi folks!
A customer of ours is using an [EMAIL PROTECTED] e-mail address. He's connected to Bluewin ADSL and cannot directly drop his outgoing mails at mail.mhs.ch since bluewin ist restricting that. Dropping a mail at mail.bluewin.ch works fine.
Why can't he drop his mail at mail.mhs.ch? Bluewin isn't restricting port 25 in any way. (Some people want this implemented, but I think we are are providing Internet access with all up's and down's) Maybe your mail server blocks connections from our IP-Range or uses some DUL/ADSL RBL?
Some destination mailservers do not allow the mail to get in because of the SPF records on the mhs.ch domain, saying that mail-deliver.mhs.ch is the only host allowed to send @mhs.ch mails.
That's a reason why we don't implement SPF or if we would we would add "?all" or "~all" so everone can send mail as beeing from bluewin.ch We would need this because some ISP ARE blocking port 25 and force their users to use their MTAs.
I'm not really a friend of that SPF stuff, but i'm much less a friend of the bluewin restrictions. Is there any other way to get out of this "Zwickm�hle" without removing our SPF records (or adding mail.bluewin.ch to them)?
As said above, Bluewin does NOT restrict outgoing port 25. You may check if the customer has the Bluewin Firewall Service. As far as I know, the firewall service should not block outgoing connections to port 25, but I'm not sure.
Guido Bluewin AG
Best wishes, Matthias
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