I believe Bigpond maintains their own internal domain blacklists. It's been a while, but postmas...@bigpond.com has been responsive for me in the past in similar cases.
Tim Starr On Tue, Apr 23, 2024 at 4:59 AM John Gao via mailop <mailop@mailop.org> wrote: > Hi Team, > > > > Does anyone have experience with subdomains being rejected by > extmail.bigpond.com? We have having problem with emails from subdomains > hosted at O365 being rejected by bigpond.com. > > > > e.g. > > - mail from @somedomain.org.au is OK > > - mail from @sub1.somedomain.org.au during mail from results in 550 5.7.1 > em...@sub1.somedomain.org.au Sender domain rejected. IB302 > > - mail from @sub2.somedomain.org.au is accepted during mail from > > > > It seems to me that sub1.somedomain.org.au is specifically blacklisted. > It is not listed any known RBL though accordingly to mxtoolbox.com or > senderbase. I see no way to getting a domain delisted in Bigpond. > > > > Any help is much appreciated. > > > > Thanks and Regards > > > > John > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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