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armaang53@sd48.org: host aspmx.l.google.com[142.251.176.27] said: 550-5.7.1 Delivery Failure: Your email message was not successfully sent or 550-5.7.1 received. SD48.org is a closed email system that does not allow for 550 5.7.1 email transmission, inbound or outbound to other domains. - gcdp l139-20020a25cc91000000b00da0cb844d87si184638ybf.87 - gsmtp (in reply to end of DATA command)