Please specify DNS settings of your domain as follow:
Cname (Alias)
Host Points to TTL autodiscover exchangediscover-redirect.swissinfocloud.ch 10 min
MX
Host Points to Priority TTL @ smtp.swissinfocloud.ch 10 10 min
TXT
Host Value TTL @ v=spf1 mx -all 10 min
TXT
Host Value TTL _dmarc v=DMARC1; p=reject; fo=s; aspf=s; 10 min
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