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The original message has been attached to this so you can view it or label similar future email. If you have any questions, see root\@localhost for details. Content preview: [https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?version=b8d100a9-0a8b-8e6a-88e1-ef488fee0470] Your message to billing@telxio.com couldn't be delivered. billing wasn't found at te [...] Content analysis details: (1.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URI: office365.com] [URI: iseencloud.net] [URI: tripstaker.com] [URI: telxio.com] [URI: telxio.onmicrosoft.com] 0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [52.102.144.17 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid 0.0 RCVD_IN_DNSWL_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to DNSWL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#DnsBlocklists-dnsbl-block for more information. [52.102.144.17 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message 0.1 MIME_HTML_MOSTLY BODY: Multipart message mostly text/html MIME 1.0 FORGED_SPF_HELO No description available. X-Spam-Flag: NO --d94853e2-5c7d-4455-9469-2e6210554852 Content-Type: multipart/alternative; differences=Content-Type; boundary="ef32fd18-ae16-4d63-a5d7-20e87c042056" --ef32fd18-ae16-4d63-a5d7-20e87c042056 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable [https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?versi= on=3Db8d100a9-0a8b-8e6a-88e1-ef488fee0470] Your message to billing@telxio.com couldn't be delivered. billing wasn't found at telxio.com. info Office 365 billing Action Required Recipient Unknown To address How to Fix It The address may be misspelled or may not exist. Try one or more of the foll= owing: * Send the message again following these steps: In Outlook, open this n= on-delivery report (NDR) and choose Send Again from the Report ribbon. In O= utlook on the web, select this NDR, then select the link "To send this mess= age again, click here." Then delete and retype the entire recipient address= . If prompted with an Auto-Complete List suggestion don't select it. After = typing the complete address, click Send. * Contact the recipient (by phone, for example) to check that the addre= ss exists and is correct. * The recipient may have set up email forwarding to an incorrect addres= s. Ask them to check that any forwarding they've set up is working correctl= y. * Clear the recipient Auto-Complete List in Outlook or Outlook on the w= eb by following the steps in this article: Fix email delivery issues for er= ror code 5.1.10 in Office 365, and then send the message again. Retype the entire recipient address = before selecting Send. If the problem continues, forward this message to your email admin. If you'= re an email admin, refer to the More Info for Email Admins section below. Was this helpful? Send feedback to Microsoft. ________________________________ More Info for Email Admins Status code: 550 5.1.10 This error occurs because the sender sent a message to an email address hos= ted by Office 365 but the address is incorrect or doesn't exist at the dest= ination domain. The error is reported by the recipient domain's email serve= r, but most often it must be fixed by the person who sent the message. If t= he steps in the How to Fix It section above don't fix the problem, and you'= re the email admin for the recipient, try one or more of the following: The email address exists and is correct - Confirm that the recipient addres= s exists, is correct, and is accepting messages. Synchronize your directories - If you have a hybrid environment and are usi= ng directory synchronization make sure the recipient's email address is syn= ced correctly in both Office 365 and in your on-premises directory. Errant forwarding rule - Check for forwarding rules that aren't behaving as= expected. Forwarding can be set up by an admin via mail flow rules or mail= box forwarding address settings, or by the recipient via the Inbox Rules fe= ature. Recipient has a valid license - Make sure the recipient has an Office 365 l= icense assigned to them. The recipient's email admin can use the Office 365= admin center to assign a license (Users > Active Users > select the recipi= ent > Assigned License > Edit). Mail flow settings and MX records are not correct - Misconfigured mail flow= or MX record settings can cause this error. Check your Office 365 mail flo= w settings to make sure your domain and any mail flow connectors are set up= correctly. Also, work with your domain registrar to make sure the MX recor= ds for your domain are configured correctly. For more information and additional tips to fix this issue, see Fix email d= elivery issues for error code 5.1.10 in Office 365. Original Message Details Created Date: 7/23/2026 6:02:21 PM Sender Address: info@tripstaker.com Recipient Address: billing@telxio.com Subject: hello telexio please add 2 user Error Details Error: 550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipient billing@telxio= .com not found by SMTP address lookup Message rejected by: YT5PR01MB036439.CANPRD01.PROD.OUTLOOK.COM Notification Details Sent by: YT5PR01MB036439.CANPRD01.PROD.OUTLOOK.COM Message Hops HOP TIME (UTC) FROM TO WITH RELAY TIME 1 7/23/2026 6:02:23 PM [127.0.0.1] server541.iseencloud.net esmtpa (Exi= m 4.99.4) (envelope-from ) 2 sec 2 7/23/2026 6:02:24 PM server541.iseencloud.net TO1PEPF00005345.mail.protec= tion.outlook.com Microsoft SMTP Server (version=3DTLS1_3, cipher=3DTLS_= AES_256_GCM_SHA384) 1 sec 3 7/23/2026 6:02:25 PM TO1PEPF00005345.CANPRD01.PROD.OUTLOOK.COM YT4PR01CA03= 55.outlook.office365.com Microsoft SMTP Server (version=3DTLS1_3, ciphe= r=3DTLS_AES_256_GCM_SHA384) 1 sec 4 7/23/2026 6:02:25 PM YT4PR01CA0355.CANPRD01.PROD.OUTLOOK.COM YT5PR01MB036439.CAN= PRD01.PROD.OUTLOOK.COM Microsoft SMTP Server (version=3DTLS1_2, ciphe= r=3DTLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) * Original Message Headers Received: from YT4PR01CA0355.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:fc::2= 5) by YT5PR01MB036439.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:199::11) with Microsoft SMTP Server (version=3DTLS1_2, cipher=3DTLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.245.11; Thu, 23 J= ul 2026 18:02:25 +0000 Received: from TO1PEPF00005345.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:fc:cafe::46) by YT4PR01CA0355.outlook.office365.com (2603:10b6:b01:fc::25) with Microsoft SMTP Server (version=3DTLS1_3, cipher=3DTLS_AES_256_GCM_SHA384) id 15.21.245.11 via Frontend Transport; T= hu, 23 Jul 2026 18:02:25 +0000 Authentication-Results: spf=3Dpass (sender IP is 162.55.65.66) smtp.mailfrom=3Dtripstaker.com; dkim=3Dpass (signature was verified) header.d=3Dtripstaker.com;dmarc=3Dpass action=3Dnone header.from=3Dtripsta= ker.com; Received-SPF: Pass (protection.outlook.com: domain of tripstaker.com designates 162.55.65.66 as permitted sender) receiver=3Dprotection.outlook= .com; client-ip=3D162.55.65.66; helo=3Dserver541.iseencloud.net; pr=3DC Received: from server541.iseencloud.net (162.55.65.66) by TO1PEPF00005345.mail.protection.outlook.com (10.167.241.5) with Microsoft SMTP Server (version=3DTLS1_3, cipher=3DTLS_AES_256_GCM_SHA384) id 15.21.2= 70.5 via Frontend Transport; Thu, 23 Jul 2026 18:02:24 +0000 DKIM-Signature: v=3D1; a=3Drsa-sha256; q=3Ddns/txt; c=3Drelaxed/relaxed; d=3Dtripstaker.com; s=3Ddefault; h=3DContent-Transfer-Encoding:Cont= ent-Type: Message-ID:Subject:To:From:Date:MIME-Version:Sender:Reply-To:Cc:Con= tent-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To= :Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Un= subscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=3DK91wr+byZRG8wLK99onFXvo6lJOljL7z3EFU1GDsAos=3D; b=3DHjsEJB8oFy= HIlNvYVejdBX6PVn rE5sJ/D89Jh6nURGY/1n4gybExQSQPgzyHlxnbg+0KERXsFgniqj99KgUAL8YzB6XV8= 8iCHhdiiBM JfqeEi0x74O2Csm+PmcQpyR6P3y+L1eSc4IBY7N1JLjqQBjPf4PW9eOablmiUlfPff8= TNZOBsbJSN qffVaQUZ0mJMHtXgt7BnUA6lwal5wIwKMt7FEkcHK9XioJLhjose0UrfIJjNSpjHgcs= dh3eePPNhk oaxsr+QaepEKkHhJyf2gKZ1GCckDVf/2F6j/n0pz4W+KeJGzN/bX8POw5oXc+4lMxLf= A2u+SSFhST WSCgkG+Q=3D=3D; Received: from [127.0.0.1] (port=3D43224 helo=3Dserver541.iseencloud.net) by server541.iseencloud.net with esmtpa (Exim 4.99.4) (envelope-from ) id 1wmxkV-00000004igt-2ADS; Thu, 23 Jul 2026 23:32:23 +0530 MIME-Version: 1.0 Date: Thu, 23 Jul 2026 23:32:21 +0530 From: info@tripstaker.com To: Billing , Billing Subject: hello telexio please add 2 user User-Agent: Roundcube Webmail/1.6.17 Message-ID: <2e0ba253e5db944f5eeddc4bbbf6c9bd@tripstaker.com> X-Sender: info@tripstaker.com Content-Type: text/plain; charset=3DUS-ASCII; format=3Dflowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with a= ny abuse report X-AntiAbuse: Primary Hostname - server541.iseencloud.net X-AntiAbuse: Original Domain - telxio.com X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tripstaker.com X-Get-Message-Sender-Via: server541.iseencloud.net: authenticated_id: info@= tripstaker.com X-Authenticated-Sender: server541.iseencloud.net: info@tripstaker.com X-Source: X-Source-Args: X-Source-Dir: Return-Path: info@tripstaker.com X-EOPAttributedMessage: 0 X-EOPTenantAttributedMessage: eebbeb6c-c042-42ec-80a2-e43caf31bdd1:0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: TO1PEPF00005345:EE_|YT5PR01MB036439:EE_ X-MS-Office365-Filtering-Correlation-Id: 00daae68-4830-496c-1b0b-08dee8e48d= 1d --ef32fd18-ae16-4d63-a5d7-20e87c042056 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable DSN
Your message to billing@telxio.com could= n't be delivered.
billing wa= sn't found at telxio.com.
info Office 365 billing
Action Required Recipient
Unknown= To address

How to Fix It
The address may be misspelled or may not exist. T= ry one or more of the following:
    To send this message again, click here." Then delete and r= etype the entire recipient address. If prompted with an Auto-Complete List = suggestion don't select it. After typing the complete address, click Sen= d.
  • Contact the recipient (by phone, for example) to = check that the address exists and is correct.
  • The recipient may have set up email forwarding to= an incorrect address. Ask them to check that any forwarding they've set up= is working correctly.
  • Clear the recipient Auto-Complete List in Outlook= or Outlook on the web by following the steps in this article: Fix email delivery issues = for error code 5.1.10 in Office 365, and then send the message again. R= etype the entire recipient address before selecting Send.
If the problem continues, forward this message to= your email admin. If you're an email admin, refer to the More Info for = Email Admins section below.

Was this helpful? Send feedback to Microsoft.

More Info for Email Admins
Status code: 550 5.1.10

This error occurs because the sender sent a message to an= email address hosted by Office 365 but the address is incorrect or doesn't= exist at the destination domain. The error is reported by the recipient do= main's email server, but most often it must be fixed by the person who sent= the message. If the steps in the How to Fix It section above don't = fix the problem, and you're the email admin for the recipient, try one or m= ore of the following:

The email address exists and is correct= - Confirm that the recipient address exists, is correct, and is accept= ing messages.

Synchronize your directories - If you have = a hybrid environment and are using directory synchronization make sure the = recipient's email address is synced correctly in both Office 365 and in you= r on-premises directory.

Errant forwarding rule - Check f= or forwarding rules that aren't behaving as expected. Forwarding can be set= up by an admin via mail flow rules or mailbox forwarding address settings,= or by the recipient via the Inbox Rules feature.

Recipient h= as a valid license - Make sure the recipient has an Office 365 license = assigned to them. The recipient's email admin can use the Office 365 admin = center to assign a license (Users > Active Users > select the recipie= nt > Assigned License > Edit).

Mail flow settings and M= X records are not correct - Misconfigured mail flow or MX record settin= gs can cause this error. Check your Office 365 mail flow settings to make s= ure your domain and any mail flow connectors are set up correctly. Also, wo= rk with your domain registrar to make sure the MX records for your domain a= re configured correctly.

For more information and additional tip= s to fix this issue, see Fix email delivery issues for error code 5.1.10 in Office 365.
Original Message Details
Created Date: 7/23/2026 6:02:21 PM
Sender Address: info@tripstaker.com
billing@telxio.com
hello telexio please add 2 user

Error Details
Error: 550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipien= t billing@telxio.com not found by SMTP address lookup
YT5PR01MB036439.CANPRD01.PROD.OUTLOOK.COM=

Notification Details
Sent by: YT5PR01MB036439.CANPRD01.PROD.OUTLOOK.COM

Original Message Headers

Received: from YT4PR01CA0355.CAN=
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 Microsoft SMTP Server (version=3DTLS1_2,
 cipher=3DTLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.245.11; Thu, 23 J=
ul
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Received: from TO1PEPF00005345.CANPRD01.PROD.OUTLOOK.COM
 (2603:10b6:b01:fc:cafe::46) by YT4PR01CA0355.outlook.office365.com
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 cipher=3DTLS_AES_256_GCM_SHA384) id 15.21.245.11 via Frontend Transport; T=
hu,
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Authentication-Results: spf=3Dpass (sender IP is 162.55.65.66)
 smtp.mailfrom=3Dtripstaker.com; dkim=3Dpass (signature was verified)
 header.d=3Dtripstaker.com;dmarc=3Dpass action=3Dnone header.from=3Dtripsta=
ker.com;
Received-SPF: Pass (protection.outlook.com: domain of tripstaker.com
 designates 162.55.65.66 as permitted sender) receiver=3Dprotection.outlook=
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Subject: hello telexio please add 2 user
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