Can an IP address be whitelisted?

I have a small GroupWise server.

The server uses blacklists.

Outgoing email from my iPhone is sent to my GWIA on port 25.

Many of my cellphone provider's dynamically assigned IP addresses are
blacklisted. <whoops!>

I can't send email from my own cellphone to/via my own GroupWise server.

I want to continue using blacklists but I'm willing to make an
exception for a couple of IP addresses and Secure Messaging Gateway is
not a solution in this case.

I actually spoke with my cellphone provider to see if they could remove
their IP addresses from the RBL servers. They didn't have a clue what I
was talking about and suggested I had a problem with my own server
because they don't blacklist IP addresses. Once I explained how
blacklists worked and they began to appreciate the magnitude of the
problem, they just laughed! I can't say I blame them! :-(

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Kevin Boyle - Knowledge Partner
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  • In article <1l8CD.1339$C62.1273@novprvlin0914.provo.novell.com>, Kevin
    Boyle wrote:
    > I actually spoke with my cellphone provider to see if they could remove
    > their IP addresses from the RBL servers. They didn't have a clue what I
    > was talking about and suggested I had a problem with my own server
    > because they don't blacklist IP addresses. Once I explained how
    > blacklists worked and they began to appreciate the magnitude of the
    > problem, they just laughed! I can't say I blame them! :-(


    That is why the generally rule of don't let end devices send SMTP on port
    25 anymore. Many ISPs block port 25 totally such that I haven't even
    tried sending from a mobile device.


    Andy of
    http://KonecnyConsulting.ca in Toronto
    Knowledge Partner
    https://forums.novell.com/member.php/75037-konecnya
    If you find a post helpful and are logged in the Web interface, please
    show your appreciation by clicking on the star below. Thanks!

  • Andy Konecny wrote:

    > In article <1l8CD.1339$C62.1273@novprvlin0914.provo.novell.com>,
    > Kevin Boyle wrote:
    > > I actually spoke with my cellphone provider to see if they could
    > > remove their IP addresses from the RBL servers. They didn't have a
    > > clue what I was talking about and suggested I had a problem with my
    > > own server because they don't blacklist IP addresses. Once I
    > > explained how blacklists worked and they began to appreciate the
    > > magnitude of the problem, they just laughed! I can't say I blame
    > > them! :-(

    >
    > That is why the generally rule of don't let end devices send SMTP on
    > port 25 anymore. Many ISPs block port 25 totally such that I haven't
    > even tried sending from a mobile device.
    >


    It's got nothing to do with port 25. Even if I used a custom high port
    and used port forwarding, the GWIA would still do an RBL check and
    refuse to accept email from a blacklisted IP address.

    I have created an Idea in the Ideas Portal. If you think it would be
    useful, please vote for it.

    Create exceptions for IP addresses on blacklists
    https://ideas.microfocus.com/MFI/mf-gw/Idea/Detail/14436

    > Blacklists are a popular way to block spam. It is easy to add them to
    > the GWIA configuration and they can be very effective but there are
    > situations where it is necessary to accept email form certain IP
    > addresses that may have been blacklisted. Currently, there is no way
    > to override a blacklisted IP address.
    >
    > It's true that products like Secure Messaging Gateway can address
    > issues like these but that is a rather large expense for a small
    > GroupWise system especially when the same could be accomplished
    > within the GWIA by creating a small exception list.




    --
    Kevin Boyle - Knowledge Partner
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below this post.
    Thank you.
Reply
  • Andy Konecny wrote:

    > In article <1l8CD.1339$C62.1273@novprvlin0914.provo.novell.com>,
    > Kevin Boyle wrote:
    > > I actually spoke with my cellphone provider to see if they could
    > > remove their IP addresses from the RBL servers. They didn't have a
    > > clue what I was talking about and suggested I had a problem with my
    > > own server because they don't blacklist IP addresses. Once I
    > > explained how blacklists worked and they began to appreciate the
    > > magnitude of the problem, they just laughed! I can't say I blame
    > > them! :-(

    >
    > That is why the generally rule of don't let end devices send SMTP on
    > port 25 anymore. Many ISPs block port 25 totally such that I haven't
    > even tried sending from a mobile device.
    >


    It's got nothing to do with port 25. Even if I used a custom high port
    and used port forwarding, the GWIA would still do an RBL check and
    refuse to accept email from a blacklisted IP address.

    I have created an Idea in the Ideas Portal. If you think it would be
    useful, please vote for it.

    Create exceptions for IP addresses on blacklists
    https://ideas.microfocus.com/MFI/mf-gw/Idea/Detail/14436

    > Blacklists are a popular way to block spam. It is easy to add them to
    > the GWIA configuration and they can be very effective but there are
    > situations where it is necessary to accept email form certain IP
    > addresses that may have been blacklisted. Currently, there is no way
    > to override a blacklisted IP address.
    >
    > It's true that products like Secure Messaging Gateway can address
    > issues like these but that is a rather large expense for a small
    > GroupWise system especially when the same could be accomplished
    > within the GWIA by creating a small exception list.




    --
    Kevin Boyle - Knowledge Partner
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below this post.
    Thank you.
Children
  • In article <4onED.1464$C62.195@novprvlin0914.provo.novell.com>, Kevin
    Boyle wrote:
    > It's got nothing to do with port 25. Even if I used a custom high port
    > and used port forwarding, the GWIA would still do an RBL check and
    > refuse to accept email from a blacklisted IP address.


    Oh I get that the actual port it is coming in to GWIA has nothing to do
    with it, more that by an ISP blocking port 25 outbound across the board
    their DHCP range, then their IPs generally don't get black listed in the
    first place. This is why all the fuss to allow GWIA to also send SMTP
    on the submittal ports(officially 587, some used 465 but we should move
    away from that one) rather than only port 25, for the ISPs that go the
    other extream.

    >
    > I have created an Idea in the Ideas Portal. If you think it would be
    > useful, please vote for it.
    >
    > Create exceptions for IP addresses on blacklists
    > https://ideas.microfocus.com/MFI/mf-gw/Idea/Detail/14436

    every vote counts, mine has been added.


    Andy of
    http://KonecnyConsulting.ca in Toronto
    Knowledge Partner
    https://forums.novell.com/member.php/75037-konecnya
    If you find a post helpful and are logged in the Web interface, please
    show your appreciation by clicking on the star below. Thanks!