• 552 Errors from PlusNet

    From Richard Porter@21:1/5 to All on Sat Feb 20 16:00:32 2021
    Does anyone else get this problem with PlusNet/Messenger Pro/POPstar?

    From time to time the server fails to accept an outgoing message which I
    have bounced to another mailbox that I read on my iMac (because of things
    that aren't supported on RISC OS). The server immediately rejects the
    message giving a 552 error thus (from POPstar log):

    18 Feb 14:21:56 030 Server failed to accept body of message 01
    18 Feb 14:21:56 030 552 CkBmlXimzgDOHCkBnl6iaZ message rejected due to
    spam or virus. If you believe this is in error please login to your portal
    or contact your ISP support team.

    The messages in question have come in without being tagged as spam and I
    am bouncing them straight to another mailbox in my PlusNet subdomain.

    When I raise a ticket with PlusNet they deny knowing what the problem is
    but messages miraculously start flowing again! Until the next time.

    So I did some investigation. The error seems to be triggered by a link in
    the body of message which if I remove it the message is accepted, but then
    the message is no longer any use. I also noticed that when I edited the outgoing message changing the original To: address to the new destination
    the message will go.

    I can zip the outgoing message which gets accepted but there's another
    issue. If I open the archive on the Mac the messages open in Mail, not Messenger Pro.

    Apologies if I've posted this before but it's been going on for some time.
    I'm suspecting (but have no proof) that PlusNet is turning the faulty
    filter off for my IP address, then some time later somebody else comes
    along and does a security audit and turns it back on again.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Martin@21:1/5 to Richard Porter on Sat Feb 20 16:40:24 2021
    In article <8afed00159.news@user.minijem.plus.com>,
    Richard Porter <ricp@minijem.plus.com> wrote:
    Does anyone else get this problem with PlusNet/Messenger
    Pro/POPstar?

    I use Force9 (ie Plusnet), Pluto, and AntiSpam (MSC)

    From time to time the server fails to accept an outgoing message
    which I have bounced to another mailbox that I read on my iMac
    (because of things that aren't supported on RISC OS).

    I somethimes bounce stuff from RISC OS to my laptop.

    The server immediately rejects the message giving a 552 error thus
    (from POPstar log):

    18 Feb 14:21:56 030 Server failed to accept body of message 01
    18 Feb 14:21:56 030 552 CkBmlXimzgDOHCkBnl6iaZ message rejected due
    to spam or virus. If you believe this is in error please login to
    your portal or contact your ISP support team.

    Just checked MSC logs (from Dec 2020 onwards), and can find no trace
    of similar messages. Before MSC I used POPstar for years, and cannot
    remember seeing anything similar.

    The messages in question have come in without being tagged as spam
    and I am bouncing them straight to another mailbox in my PlusNet
    subdomain.

    Just as I do sometimes.

    [Snip]

    But no help to you, as it has not affected me, sorry.
    Your suggested causes sound possible, but I never heard of it
    happening. Can you set up an artificial one that you send every week,
    and see if/when it fails?

    Martin

    --
    Martin Avison
    Note that unfortunately this email address will become invalid
    without notice if (when) any spam is received.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From druck@21:1/5 to Richard Porter on Sat Feb 20 20:47:10 2021
    On 20/02/2021 16:00, Richard Porter wrote:
    Does anyone else get this problem with PlusNet/Messenger Pro/POPstar?

    The messages in question have come in without being tagged as spam and I
    am bouncing them straight to another mailbox in my PlusNet subdomain.

    When I raise a ticket with PlusNet they deny knowing what the problem is
    but messages miraculously start flowing again! Until the next time.

    Yes I have this quite frequently. PlusNet have some sort of detection
    for open email relays, and resending an identical copy of commercial
    looking email (usually html with links), will trigger it. I normally
    just forward the email in plain text, which usually works, although I'm
    sure there was one recently which refused to go even with this.

    ---druck

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Steve Fryatt@21:1/5 to Richard Porter on Mon Feb 22 22:21:51 2021
    On 20 Feb, Richard Porter wrote in message
    <8afed00159.news@user.minijem.plus.com>:

    The messages in question have come in without being tagged as spam and I
    am bouncing them straight to another mailbox in my PlusNet subdomain.

    Is it a DMARC issue? If so, it would need the sender of the bounced mail (or their mail provider) to have things configured in a certain way -- which
    could easily explain the randomness of the problem.

    --
    Steve Fryatt - Leeds, England

    http://www.stevefryatt.org.uk/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Richard Porter@21:1/5 to All on Sat Feb 27 11:25:46 2021
    The date being 22 Feb 2021, Steve Fryatt <news@stevefryatt.org.uk> decided
    to write:

    On 20 Feb, Richard Porter wrote in message
    <8afed00159.news@user.minijem.plus.com>:

    The messages in question have come in without being tagged as spam and I
    am bouncing them straight to another mailbox in my PlusNet subdomain.

    Is it a DMARC issue? If so, it would need the sender of the bounced mail (or their mail provider) to have things configured in a certain way -- which could easily explain the randomness of the problem.

    I don't think it's a DMARC issue. DMARC creates all sorts of problems for
    AoL subscribers on mailing lists but this is different. More likely DKIM
    but I don't understand how that works!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Steve Fryatt@21:1/5 to Richard Porter on Sun Feb 28 15:19:44 2021
    On 27 Feb, Richard Porter wrote in message
    <f9b0520559.news@user.minijem.plus.com>:

    I don't think it's a DMARC issue. DMARC creates all sorts of problems for
    AoL subscribers on mailing lists but this is different. More likely DKIM
    but I don't understand how that works!

    DKIM is just one of the technologies that makes up the wider collection
    known as DMARC. SPF is the one that causes more visible issues for badly-configured mailing lists, but DKIM can also show up a number of
    problems.

    To be honest, from your description, I was guessing that SPF could be worth looking at for the cause.

    --
    Steve Fryatt - Leeds, England

    http://www.stevefryatt.org.uk/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Chris Evans (CJE/4D)@21:1/5 to URL:mailto:news@druck.org.uk on Thu Mar 4 16:27:07 2021
    In article <s0rsgf$glu$1@dont-email.me>, druck
    <URL:mailto:news@druck.org.uk> wrote:
    On 20/02/2021 16:00, Richard Porter wrote:
    Does anyone else get this problem with PlusNet/Messenger Pro/POPstar?

    The messages in question have come in without being tagged as spam and I
    am bouncing them straight to another mailbox in my PlusNet subdomain.

    When I raise a ticket with PlusNet they deny knowing what the problem is but messages miraculously start flowing again! Until the next time.

    Yes I have this quite frequently. PlusNet have some sort of detection
    for open email relays, and resending an identical copy of commercial
    looking email (usually html with links), will trigger it. I normally
    just forward the email in plain text, which usually works, although I'm
    sure there was one recently which refused to go even with this.

    We quite often get this with Plusnet here when trying to bounce (To a
    Windows computer) emails we receive.

    Scenario often is:
    We get a spam email from what seems a valid company that includes an unsubscribe link [1] which will not work in a RISC OS browser. So we try and bounce it to my Windows 10 laptop

    [1] Unsubscribing does seem to work most times. I know some people think you shouldn't unsubscribe as that tells them they have a live email address but
    I think the upside of actually being unsubscribed most of the time worth it. Any email that is obviously 'phishing' I don't try unsubscribing too.

    i.e. plusnet antispam outward filters are more effective than their incoming filters.

    Chris Evans

    --

    ****** IGEPv5: The fastest RISC OS computer so far! *******
    ------------ http://www.cjemicros.co.uk/igepv5 ------------
    CJE Micro's 'Raspberry Pi & RISC OS Specialists'
    Tel: +44 (0)1903 523222
    chris@cjemicros.co.uk http://www.cjemicros.co.uk/
    Unit 16 Arunside Ind. Est., Fort Road, Littlehampton, W.Sussex BN17 7QU

    Don't let the urgent things in life, crowd out the important things!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Richard Porter@21:1/5 to decided to on Thu Mar 4 21:57:52 2021
    The date being 4 Mar 2021, "Chris Evans (CJE/4D)" <chris@cjemicros.co.uk> decided to write:

    In article <s0rsgf$glu$1@dont-email.me>, druck
    <URL:mailto:news@druck.org.uk> wrote:
    On 20/02/2021 16:00, Richard Porter wrote:
    Does anyone else get this problem with PlusNet/Messenger Pro/POPstar?

    The messages in question have come in without being tagged as spam and I >>> am bouncing them straight to another mailbox in my PlusNet subdomain.

    When I raise a ticket with PlusNet they deny knowing what the problem is >>> but messages miraculously start flowing again! Until the next time.

    Yes I have this quite frequently. PlusNet have some sort of detection
    for open email relays, and resending an identical copy of commercial
    looking email (usually html with links), will trigger it. I normally
    just forward the email in plain text, which usually works, although I'm
    sure there was one recently which refused to go even with this.

    We quite often get this with Plusnet here when trying to bounce (To a
    Windows computer) emails we receive.

    Scenario often is:
    We get a spam email from what seems a valid company that includes an unsubscribe link [1] which will not work in a RISC OS browser. So we try and bounce it to my Windows 10 laptop

    [snip]

    In my case I'm usually forwarding messages from Rail Technology Magazine
    which are full of links to articles on their web site. Some of these items don't display in NetSurf. The messages definitely aren't spam.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)