Delivery Failed because of dual sender verification

Question

hi Community, 
 I have switched the mail flow from an XGS Firewall to Central Email. Unfortunately, I made a mistake and configured a duplicate sender verification, on both the XGS Firewall and Central. Now, several emails are showing up in the Message History with the status 'Delivery Failed'. Will these emails be resent after a certain period of time? 
 SMTP Text: 
 (host X.X.X.X[X.X.X.X] said: 550 1.2.3.4 is not allowed to send mail from domain.com (in reply to RCPT TO command))

Vivek Jagad · Answer

Hello vvovva ,

Thank you for reaching out the community, 4xx ranged status codes will denote a temporary error, if Sophos is presented with a 4xx series status code it will retry to send.
*5xx ranged status codes will mean a fatal error occurred, rejection, or the process cannot be processed; if Sophos is presented with a 5xx series code it will not retry.

Delivery Failed because of dual sender verification

SMTP Text:

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