Email to all members not working

Any email sent to our member group email address (Members) does not go for either of my clubs, Calgary Talking Toastmasters 878113 and Engineering and Geoscience Toastmasters 7866689.

This is what one of the errors looked '554 5.0.0 < #5.0.0 X-Unix; 104>'Original message headers:
 Received: from ([52.103.20.50])        by (8.17.1/8.17.1) with ESMTPS id 5BMFwcYW4056234        (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=OK)        for <>; Mon, 22 Dec 2025 15:58:40 GMTARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=; cv=none;

Could you please help?

Thanks!

Please provide the full message header.

Sure thing, here you go, thanks!

Generating server:
members-878113@

Remote server returned '554 5.7.0 <;550 5.7.350 Remote server returned message detected as spam -> 550 5.7.1 <members-878113@>... Mail from 52.103.14.84 refused because IP is on SpamCop - see >'
Original message headers:
ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=; cv=none;
b=UKA0cBQtaWVccIViDf78NmnJwbFJQkLce100s/c4YMro1qzFwx8+/PADDaaPj+IdLylbhEacRdAkjReahpHz0stcOAIGlZkIzaCLN9XgmTMPQ7BT3DMor12L4+QtRKFv2Fj4j786p1hQ0k/m++Qib0Ww76ZIv8gwkMfYZdfFZwsQavify3qdCIdzMJA5j6oxgd1VpyzX9apVjHFBdfp+D1lw+0/YkBU+3sbrVYIXHrfUkX00vIsFrCorDpSdQ4O+pWHyMsZkbPCxByPaC71ndFjxes3rz95R6OHra1tly4/KmLD4RHlpkAdX0MQxwU6thx9tzfSOVQ42rrw8wMZAVg==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=;
s=arcselector10001;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;
bh=fbQ5npXDOfMuH/GMDyM4TBLuQaEDG8JphBWKgPP18tU=;
b=TLGb+Cj0+aA0aK7OIjZRhPjOIAvIb+xcsNoJgOtll0wkK2S5AYynVw75NcOYAJm/51Gd+zDux8Mk7aljFQu8affeY/NSTQ0GtblWOYhQoROtdEni9+bnW2cO2oqO7LOHOGSUD8x4a5bAjoBX+EnyRV8OmXfXI7p70Lft5UEdeEWYQHMGBI5D3AecRuyc0Tk2AmmoCnu6N5LYDNXTccUFnKAVEqCjg73NYRXvMos2Yxm68KabnDFg1tEgUMM4Gy3oSccr7F4pZPo1qv5oFFjxQUoBSywoCRO3ZnPmtCcGFWhOLYkpis4wfnJ+MfeOIghFYgYtq07yExWNgYAG5YS8Iw==
ARC-Authentication-Results: i=1; ; spf=none; dmarc=none;
dkim=none; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=;
s=selector1;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
bh=fbQ5npXDOfMuH/GMDyM4TBLuQaEDG8JphBWKgPP18tU=;
b=lH/4bHE018yzm2xXTgnyc4pBvMngA+H+VVx6gADm2Im2WKyqtCWQf9qI39JYuCdS5qL8ORFL+0+DbpxIrsbQABkP2PcVaCw4zMmbrQHGc0qllBBbtD/DJSEBOn+cj5bawWBgJ36iw/vYOe1XzXjn26sym/RhM5xtgm8l7AlJ8xeHnPxCt7YJ7NVpSwSgrLMmw6ZualFUuU638e4fGsV/rNax2DnKuU9QwFr1nJnU8JEtg8GG18OmCG+pi1PI2YO4dDCiKdShAzOP5hwT2FX5Ub9pejO9hByelziSkws0j/8i7e5soCTvZKnrdnVSaqZX2kLw3yx+Qf4z4EYETuAjrg==
Received: from (2603:10b6:408:1b4::11)
by (2603:10b6:5:210::22) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9434.11; Mon, 22 Dec
2025 16:01:36 +0000
Received: from
([fe80::1683:6bbd:7cd2:fff1]) by
([fe80::1683:6bbd:7cd2:fff1%7]) with mapi id 15.20.9434.009; Mon, 22 Dec 2025
16:01:35 +0000

Here is your problem, you mail server IP is on Spamcop contact your email service.

Thanks Brian, that message was from earlier today.

I just tried again and got this error, any ideas?

Generating server: toastmastersclubs.org
members-878113@toastmastersclubs.org
Remote server returned '554 5.0.0 < #5.0.0 X-Unix; 104>'
Original message headers:
Return-Path: <tmprinceton@outlook.com>
Received: from DM1PR04CU001.outbound.protection.outlook.com (mail-centralusazolkn19010022.outbound.protection.outlook.com [52.103.13.22])
by toastmastersclubs.org (8.17.1/8.17.1) with ESMTPS id 5BMJ09Ac4181637
(version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=OK)
for <members-878113@toastmastersclubs.org>; Mon, 22 Dec 2025 19:00:09 GMT
ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none;
b=H1bprrcdRhK++dQmJOUWZUFew5Qvrgv/kGCWS1QGNeZpw2H70FZWYOwWvfPIET3YWmQARxdiPJ9mJHl3sRshpZLcwheHbI9Dj6GKClvD+pk73za1iM+LxBmCdZ9Cs7qc5/P1IqJV58mYR9eb8v5XzAhtFMA2PjcSpNi+SOVxB20E40sN17AZ0g/aSSWeV6mk/yUQ2w3ygUpS8kLXSwlorPMLbSQZ1bcS8cARKICUlAzcS5R0d5Rh6ch4LLKHn68/9/u7lN0ZTycagHjp9u8EdHFZExM57ZjRd32DvDngqD34zroBtFqlUkVOG536DEMbipXGHJTJnvgAeYqfgq+kAQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;
s=arcselector10001;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;
bh=ffmrt60zNxG5Gwl2rwB7NZapSTMrYnDcCHAZabn6MRA=;
b=BdPc67S3ITimj4tuAekX7fb6Li0RDQdO+l67w/TVXujLecoi4GCywoalhzbcbITrVhoRgTeZlrv0o53uwAUBLbbT8UakX3we7OS7CrlHLW7p+RelNuS4ixqliUal7vX81UDZRg2LAtMomnN7rTY7TgkCtJ4qr2LP8k04uz1o0jIz8lnpWXuIFf/xBQIkOGjtK6ULBX7J+hW8gnBKVzg6hNBh8TCi1jC3Qn+Nr2wIazkDCLbSUQPRZXMLHTiIJh0hgubIJmzuJB3ieP/Ks3ptegl3ekxBTaDJshwOcI3h99ep5eX0LpgIVZEM+Bf/64bNfk/DdD2zQwrSV4MrvFgoqw==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none;
dkim=none; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outlook.com;
s=selector1;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
bh=ffmrt60zNxG5Gwl2rwB7NZapSTMrYnDcCHAZabn6MRA=;
b=gL7pxg9wFg5ejW6LtWHzU2IPBjvLKk7wLZDlIuJBySFTbanV88RQtFFT2mz7YQ1Ugtckl3fXApX/IDn5kQKXnc/HsW+G+j0hKrbAypB27e7ZyTHJwAQM/JfC0kaYPAWK7emNn8RpyvGB2Y+5rtezSUa5eHN6avsXW06/tGvX0lVx9iPBQiX6LedTf1VFMjZi68obrBJiBNU/ckCyYknypv8LxL8c0/7y7NUJVCqL5C4EU2iJVMqxoc/9riSpYf6YxdfjD5/jtbCpOHVniAvfXQyMXNk5n4dAR0f1kFcHPWVhPpChSI15xboWmWvB6Tul/koRvw7oQeb6giI1agbcNA==
Received: from LV3PR10MB7748.namprd10.prod.outlook.com (2603:10b6:408:1b4::11)
by SA3PR10MB7042.namprd10.prod.outlook.com (2603:10b6:806:317::18) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9434.11; Mon, 22 Dec
2025 19:00:04 +0000
Received: from LV3PR10MB7748.namprd10.prod.outlook.com
([fe80::1683:6bbd:7cd2:fff1]) by LV3PR10MB7748.namprd10.prod.outlook.com
([fe80::1683:6bbd:7cd2:fff1%7]) with mapi id 15.20.9434.009; Mon, 22 Dec 2025
19:00:04 +0000