It is subdomain.domain.org.au. I took Tim's advice and sent an email to postmas...@bigpond.com<mailto:postmas...@bigpond.com>. Fingers crossed.
Thanks John From: Christopherson, Mark T. <mtchristopher...@iwcc.edu> Sent: Wednesday, 24 April 2024 00:58 To: John Gao <john....@hyperg.com.au> Subject: RE: [EXT] [mailop] bigpond.com IB302 sender domain rejected Shot in the dark here, but are your subdomains sending as subdomain.domain.tld or as subdomain.domain.onmicrosoft.com? If it's the latter, there might be manual organizational blacklisting in place due to a massive uptick of spam from those on hundreds of tenants a few months back. From: mailop <mailop-boun...@mailop.org<mailto:mailop-boun...@mailop.org>> On Behalf Of John Gao via mailop Sent: Tuesday, April 23, 2024 4:47 AM To: mailop@mailop.org<mailto:mailop@mailop.org> Subject: [EXT] [mailop] bigpond.com IB302 sender domain rejected EXTERNAL WARNING: This email originated outside of Iowa Western Community College. DO NOT CLICK links or attachments unless you recognize the sender and know the content is safe. QUESTIONS? Please contact IT Helpdesk at 712-325-3220 or forward to ab...@iwcc.edu<mailto:ab...@iwcc.edu> ________________________________ 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<mailto: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
