I am trying to send emails to a users [email address removed per the Verizon Terms of Service] address from Microsoft 365 and am getting 421 errors and the email just sits at pending. This is for a doctor and they need to receive these texts quickly. below is the message that is given as the pending reason in the message trace...
Reason: [{LED=450 4.4.317 Cannot connect to remote server [Message=421 vrz-ibgw-6002a.ext.cloudfilter.net cmsmtp 40.107.243.100 server temporarily unavailable AUP#CNCT] [LastAttemptedServerName=vtext.com] [LastAttemptedIP=35.165.168.89:25] [SmtpSecurity=-2;-2] [DM6NAM12FT045.eop-nam12.prod.protection.outlook.com 2024-07-15T15:. OutboundProxyTargetIP: 35.165.168.89. OutboundProxyTargetHostName: vtext.com
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