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Degraded Performance
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Maintenance
Scheduled Maintenance
Sinch Contact Pro - Test tenant upgrade Dec 29, 2025 06:00-14:00 UTC
Dear Customer
This notification is related to Contact Pro test tenant maintenance.
If you currently do not have a test tenant, please ignore this message.
We will be upgrading all customer test tenants to the newest release 26Q1 on Monday 29th of December.
During the day, there will be approximately 30 minutes service break for your test tenant.
Tenants will be ready for your testing on Tuesday 30th of December at 07:00 UTC.
Production tenants will be upgraded on January 24-25th.
What´s new documentation regarding the upcoming 26Q1 release is available in:
https://docs.cc.sinch.com/cloud/whats-new/en/index.html
For more details or questions related to the maintenance you can contact us via a support ticket:
https://sinchenterprise.atlassian.net/servicedesk/customer/portal/1181
Best Regards,
Sinch Contact Pro team
Posted on Dec 22, 2025 - 14:55 UTC
This notification is related to Contact Pro test tenant maintenance.
If you currently do not have a test tenant, please ignore this message.
We will be upgrading all customer test tenants to the newest release 26Q1 on Monday 29th of December.
During the day, there will be approximately 30 minutes service break for your test tenant.
Tenants will be ready for your testing on Tuesday 30th of December at 07:00 UTC.
Production tenants will be upgraded on January 24-25th.
What´s new documentation regarding the upcoming 26Q1 release is available in:
https://docs.cc.sinch.com/cloud/whats-new/en/index.html
For more details or questions related to the maintenance you can contact us via a support ticket:
https://sinchenterprise.atlassian.net/servicedesk/customer/portal/1181
Best Regards,
Sinch Contact Pro team
Posted on Dec 22, 2025 - 14:55 UTC
Sinch Internal Maintenance - SSL Certificate Update Jan 5, 2026 09:00-12:00 UTC
Sinch will be performing a scheduled maintenance to renew the SSL certificate for the Sinch Aries API during the times specified below.
Type: Scheduled Maintenance
Maintenance: SSL Certificate Updates
Start Time: 2026-01-05 09:00 UTC
End Time: 2026-01-05 12:00 UTC
Impact: Clients connecting to the Sinch Aries endpoints below via the SSL secure port will fail if the client SSL application does not have the updated SSL certificate preloaded in its SSL trust store for a seamless SSL certificate switchover.
Affected Endpoint:
aries.mad.api.sinch.com
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled we will advise you accordingly.
Download the certificate files for all the above mentioned certificates here:
https://clxgroup.sharepoint.com/:f:/s/CLX_Support_Anonymous_link/IgDbUm2lAcPASIWKcroSgGlHAbCetX9X4cpAMsaxf4mBoOA?e=0ScPdV
Posted on Dec 15, 2025 - 07:49 UTC
Type: Scheduled Maintenance
Maintenance: SSL Certificate Updates
Start Time: 2026-01-05 09:00 UTC
End Time: 2026-01-05 12:00 UTC
Impact: Clients connecting to the Sinch Aries endpoints below via the SSL secure port will fail if the client SSL application does not have the updated SSL certificate preloaded in its SSL trust store for a seamless SSL certificate switchover.
Affected Endpoint:
aries.mad.api.sinch.com
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled we will advise you accordingly.
Download the certificate files for all the above mentioned certificates here:
https://clxgroup.sharepoint.com/:f:/s/CLX_Support_Anonymous_link/IgDbUm2lAcPASIWKcroSgGlHAbCetX9X4cpAMsaxf4mBoOA?e=0ScPdV
Posted on Dec 15, 2025 - 07:49 UTC
Planned Maintenance - MMS Jan 6, 2026 09:00-12:00 UTC
Dear Client,
We are writing to inform you that as part of our continuous efforts to improve the performance and reliability of our platform, we will be performing a scheduled maintenance on MMS platform at the times specified below.
Type: Maintenance - MMS
Start Time: 2026-01-06 09:00 UTC
End Time: 2026-01-06 12:00 UTC
Impact MMS: MMS US, MMS AU, MMS CA. Messages will be Queued and will be processed post upgrade. We expect intermittent delays during the maintenance window.
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly.
Please contact support@sinch.com should you require further information or assistance.
Posted on Dec 18, 2025 - 16:33 UTC
We are writing to inform you that as part of our continuous efforts to improve the performance and reliability of our platform, we will be performing a scheduled maintenance on MMS platform at the times specified below.
Type: Maintenance - MMS
Start Time: 2026-01-06 09:00 UTC
End Time: 2026-01-06 12:00 UTC
Impact MMS: MMS US, MMS AU, MMS CA. Messages will be Queued and will be processed post upgrade. We expect intermittent delays during the maintenance window.
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly.
Please contact support@sinch.com should you require further information or assistance.
Posted on Dec 18, 2025 - 16:33 UTC
External Maintenance - Toll-Free Number Provider Jan 8, 2026 04:00-08:00 UTC
Our Toll-Free number provider has scheduled a maintenance.
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-08 04:00 UTC
Maintenance end time: 2026-01-08 08:00 UTC
Posted on Dec 17, 2025 - 09:13 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-08 04:00 UTC
Maintenance end time: 2026-01-08 08:00 UTC
Posted on Dec 17, 2025 - 09:13 UTC
DI E-Mail 365 | Application Maintenance | PCR Number # PCRSDI-12060 Jan 11, 2026 02:00-04:00 UTC
Services :: DI E-Mail 365
PCR Number :: PCRSDI-12060
Start Date and Time (GMT):: 11th Jan 2026 02:00 UTC.
End Date and Time (GMT):: 11th Jan 2026 04:00 UTC.
Description:
Email365 - Disable unsubscribe email address unsubscribe@eu1mail.sapdigitalinterconnect.com
Zero/No impact on traffic .
Impact:
No impact .
If you experience any issues during this maintenance , please contact the Operator Service NOC immediately at operatorservices.noc@sinch.com or +1 470.300.8394 (select 'support' from the menu, option 2 for Digital Interconnect and then option 1) and reference this notification.
Posted on Dec 22, 2025 - 14:53 UTC
PCR Number :: PCRSDI-12060
Start Date and Time (GMT):: 11th Jan 2026 02:00 UTC.
End Date and Time (GMT):: 11th Jan 2026 04:00 UTC.
Description:
Email365 - Disable unsubscribe email address unsubscribe@eu1mail.sapdigitalinterconnect.com
Zero/No impact on traffic .
Impact:
No impact .
If you experience any issues during this maintenance , please contact the Operator Service NOC immediately at operatorservices.noc@sinch.com or +1 470.300.8394 (select 'support' from the menu, option 2 for Digital Interconnect and then option 1) and reference this notification.
Posted on Dec 22, 2025 - 14:53 UTC
Sinch Engage Campaign Database Maintenance Jan 11, 2026 23:00-23:30 UTC
We will be performing planned maintenance on the Sinch Engage Campaigns database.
Impact: During the maintenance window there will be a 3 minute outage during which new SMS, MMS, and RCS campaigns cannot be created. Any campaigns scheduled to be sent during this period will be queued and sent after the outage window.
Maintenance start time: 2026-01-11 23:00:00 UTC
Maintenance end time: 2026-01-11 23:30:00 UTC
Posted on Nov 25, 2025 - 10:45 UTC
Impact: During the maintenance window there will be a 3 minute outage during which new SMS, MMS, and RCS campaigns cannot be created. Any campaigns scheduled to be sent during this period will be queued and sent after the outage window.
Maintenance start time: 2026-01-11 23:00:00 UTC
Maintenance end time: 2026-01-11 23:30:00 UTC
Posted on Nov 25, 2025 - 10:45 UTC
Planned Maintenance - MMS Jan 12, 2026 09:00-11:00 UTC
Dear Client,
We are writing to inform you that as part of our continuous efforts to improve the performance and reliability of our platform, we will be performing a scheduled maintenance on MMS platform at the times specified below.
Type: Maintenance - MMS
Start Time: 2026-01-12 09:00 UTC
End Time: 2026-01-12 11:00 UTC
Impact MMS: MMS US, MMS AU, MMS CA. Messages will be Queued and will be processed post upgrade. We expect intermittent delays during the maintenance window.
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly.
Please contact support@sinch.com should you require further information or assistance.
Posted on Dec 18, 2025 - 16:33 UTC
We are writing to inform you that as part of our continuous efforts to improve the performance and reliability of our platform, we will be performing a scheduled maintenance on MMS platform at the times specified below.
Type: Maintenance - MMS
Start Time: 2026-01-12 09:00 UTC
End Time: 2026-01-12 11:00 UTC
Impact MMS: MMS US, MMS AU, MMS CA. Messages will be Queued and will be processed post upgrade. We expect intermittent delays during the maintenance window.
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly.
Please contact support@sinch.com should you require further information or assistance.
Posted on Dec 18, 2025 - 16:33 UTC
External Maintenance - Toll-Free Number Provider Jan 15, 2026 04:00-08:00 UTC
Our Toll-Free number provider has scheduled a maintenance.
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-15 04:00 UTC
Maintenance end time: 2026-01-15 08:00 UTC
Posted on Dec 17, 2025 - 09:13 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-15 04:00 UTC
Maintenance end time: 2026-01-15 08:00 UTC
Posted on Dec 17, 2025 - 09:13 UTC
External Maintenance - Toll-Free Number Provider Jan 22, 2026 04:00-08:00 UTC
Our Toll-Free number provider has scheduled a maintenance.
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-22 04:00 UTC
Maintenance end time: 2026-01-22 08:00 UTC
Posted on Dec 17, 2025 - 09:13 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-22 04:00 UTC
Maintenance end time: 2026-01-22 08:00 UTC
Posted on Dec 17, 2025 - 09:13 UTC
External Maintenance - Toll-Free Number Provider Jan 29, 2026 04:00-08:00 UTC
Our Toll-Free number provider has scheduled a maintenance.
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-29 04:00 UTC
Maintenance end time: 2026-01-29 08:00 UTC
Posted on Dec 17, 2025 - 09:14 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Impact MMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States.
Maintenance start time: 2026-01-29 04:00 UTC
Maintenance end time: 2026-01-29 08:00 UTC
Posted on Dec 17, 2025 - 09:14 UTC
Singapore Regulatory Compliance Maintenance - A2P SMS APIs - TLS 1.3 Requirement Apr 1, 2026 00:00-01:00 UTC
The Infocomm Media Development Authority (IMDA) of Singapore has mandated the use of TLS (Transport Layer Security) 1.3 for all API connections handling A2P SMS traffic, effective April 1, 2026.
To ensure compliance and prevent any possible service disruption, all customers sending SMS traffic to Singapore must update their systems to support TLS 1.3 before this deadline.
Sinch Platform Readiness:
Our commitment is to provide a secure and resilient infrastructure.
We have already enabled full TLS 1.3 support across our global A2P SMSC infrastructure. The final site, EU3 (IP 93.158.78.4), will be fully compliant to TLS 1.3 by end of February 2026, well ahead of the deadline.
Required Customer Action:
Verify Your Configuration: We strongly urge you to begin transitioning your systems to use TLS 1.3 for connections to Sinch immediately.
Compliance Deadline:
In accordance with IMDA requirements, connections using TLS 1.2 for traffic to Singapore should not be supported after April 1, 2026. To avoid any possible interruption of service to Singapore, you must complete your transition before this date.
Our team is ready to help ensure your transition is smooth and seamless.
Please do not hesitate to contact our customer support or account manager if you have any questions or require assistance.
Posted on Nov 04, 2025 - 12:48 UTC
To ensure compliance and prevent any possible service disruption, all customers sending SMS traffic to Singapore must update their systems to support TLS 1.3 before this deadline.
Sinch Platform Readiness:
Our commitment is to provide a secure and resilient infrastructure.
We have already enabled full TLS 1.3 support across our global A2P SMSC infrastructure. The final site, EU3 (IP 93.158.78.4), will be fully compliant to TLS 1.3 by end of February 2026, well ahead of the deadline.
Required Customer Action:
Verify Your Configuration: We strongly urge you to begin transitioning your systems to use TLS 1.3 for connections to Sinch immediately.
Compliance Deadline:
In accordance with IMDA requirements, connections using TLS 1.2 for traffic to Singapore should not be supported after April 1, 2026. To avoid any possible interruption of service to Singapore, you must complete your transition before this date.
Our team is ready to help ensure your transition is smooth and seamless.
Please do not hesitate to contact our customer support or account manager if you have any questions or require assistance.
Posted on Nov 04, 2025 - 12:48 UTC