to=<Email住址會使用灌水程式保護機制。你需要啟動Javascript才能觀看它>, relay=alt1.gmail-smtp-in.l.google.com[142.250.141.27]:25, delay=2.9, delays=0.05/0/2.1/0.68, dsn=4.7.26, status=deferred (host alt1.gmail-smtp-in.l.google.com[142.250.141.27] said: 421-4.7.26 Your email has been rate limited because it is unauthenticated. Gmail 421-4.7.26 requires all senders to authenticate with either SPF or DKIM. 421-4.7.26 421-4.7.26 Authentication results: 421-4.7.26 DKIM = did not pass 421-4.7.26 SPF [test1.ublink.org] with ip: [168.95.4.211] = did not 421-4.7.26 pass 421-4.7.26 421-4.7.26 For instructions on setting up authentication, go to 421 4.7.26 https://support.google.com/mail/answer/81126#authentication 98e67ed59e1d1-2dbb9defafdsi1432153a91.183 - gsmtp (in reply to end of DATA command))