なぜかSPFがエラーに。 いきなり 550 返答
1. whois
2024-02-08 22:26:10.453615500 delivery 279: failure: 108.177.97.26_failed_after_I_sent_the_message./Remote_host_said:_550-5.7.26_This_mail_has_been_blocked_because_the_sender_is_unauthenticated./550-5.7.26_Gmail_requires_all_senders_to_authenticate_with_either_SPF_or_DKIM./550-5.7.26_/550-5.7.26__Authentication_results:/550-5.7.26__DKIM_=_did_not_pass/550-5.7.26__SPF_[m.qmail.jp]_with_ip:_[157.7.113.173]_=_did_not_pass/550-5.7.26_/550-5.7.26__For_instructions_on_setting_up_authentication,_go_to/550_5.7.26__https://support.google.com/mail/answer/81126#authentication_y21-20020a170902e19500b001d98b864a19si1693705pla.296_-_gsmtp/STARTTLS_proto=TLSv1.3;_cipher=TLS_AES_256_GCM_SHA384;_subject=/CN=mx.google.com;_issuer=/C=US/O=Google_Trust_Services_LLC/CN=GTS_CA_1C3;/
2. history
2024-02-06 19:22:56.437604500 delivery 237: success: 173.194.174.27_accepted_message./Remote_host_said:_250_2.0.0_OK__1707214976_d2-20020a63d642000000b005cd7b938543si1470553pgj.185_-_gsmtp/STARTTLS_proto=TLSv1.3;_cipher=TLS_AES_256_GCM_SHA384;_subject=/CN=mx.google.com;_issuer=/C=US/O=Google_Trust_Services_LLC/CN=GTS_CA_1C3;/