As a result of improvements to our Mail2SMS, SMS2Mail and SMS4Exchange infrastructure, you will notice a change, which we want to inform you proactively about.
What will change:
New email relays will deliver Mail2SMS and SMS4Exchange status emails and SMS2Mail message emails. These relays will have different source IP addresses and DNS names compared to the relays that are currently in use. Please see "3. Technical Details" below for more information.
If you have any SMTP related configuration and/or network restrictions in place for incoming Retarus SMS services emails referencing the current email relays, please account for the new hostname and IP addresses. Potential cases where the relays are relevant include IP whitelisting, firewall restrictions, SPF records for custom SMS domains you may be using, etc.
Please allow all IPs specified in SPF record "sms.de.retarus.com". For your convenience, here is a list of relays currently listed.
service-mtaout01.de2.retarus.com / 184.108.40.206
service-mtaout02.de2.retarus.com / 220.127.116.11
service-mtaout01.de1.retarus.com / 18.104.22.168
service-mtaout02.de1.retarus.com / 22.214.171.124
In the future we will use this SPF record to publish new email relays related to our SMS services; therefore where possible please use this SPF record or the records it includes for your configuration.
Please ensure that relevant stakeholders are subscribed to status.retarus.io, as we will always announce relevant changes there.
If you have any custom routing setup in place or require additional assistance please contact firstname.lastname@example.org.
Starting February 1st 2020, Retarus will no longer support the deprecated and vulnerable protocols TLSv1.0 and TLSv1.1 with our Faxolution For Applications service SOAP and REST. Beginning that day, we will only be accepting requests compliant with TLSv1.2.
To test your application, you may use endpoints provided below. These endpoints act the same as production URLs, but they only support TLS1.2.
Please be sure to update your production systems before February 2020.
If you have any questions or concerns, you may contact us at 844-RETARUS or send us an email to email@example.com