[bitfolk] Help needed - mailserver and gmail don't play nice.

Hi all, I am trying (and so far failing miserably) to set my VPS up to handle mail. It only has to forward mail for about 5 domains. google is rejecting everything, and I don't understand why. According to this page https://support.google.com/a/answer/81126 I must authenticate with EITHER spf or DKIM. According to https://easydmarc.com/tools/spf-lookup?domain=ianhobson.com the spf is set up correctly, and it has been for well over the TTL of 1 hour. However when I send hobson42(a)gmail.com a message, from ian(a)ianhobson.com, I get the following log entries... 2025-02-22T12:14:14.865917+00:00 ianhobson postfix/cleanup[4869]: D306590480: message-id=&lt;20250222121414.D306590480(a)ianhobson.com&gt; 2025-02-22T12:14:14.868393+00:00 ianhobson postfix/qmgr[4763]: D306590480: from=<>, size=3366, nrcpt=1 (queue active) 2025-02-22T12:14:14.870663+00:00 ianhobson postfix/bounce[4872]: 533129047F: sender non-delivery notification: D306590480 2025-02-22T12:14:14.870988+00:00 ianhobson postfix/qmgr[4763]: 533129047F: removed 2025-02-22T12:14:15.257167+00:00 ianhobson postfix/smtp[4871]: D306590480: to=&lt;hobson42(a)gmail.com&gt;om>, orig_to=&lt;ian(a)ianhobson.com&gt;om>, relay=gmail-smtp-in.l.google.com[64.233.184.27]:25, delay=0.39, delays=0/0/0.08/0.3, dsn=5.7.26, status=bounced (host gmail-smtp-in.l.google.com[64.233.184.27] said: 550-5.7.26 Your email 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 [] with ip: [85.119.82.117] = 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 ffacd0b85a97d-38f25a3ee76si17083121f8f.811 - gsmtp (in reply to end of DATA command)) 2025-02-22T12:14:15.259036+00:00 ianhobson postfix/qmgr[4763]: D306590480: removed If I read this correctly, spf authentication failed. The spf entry is TXT, NAME=@ DATA="v=spf1 ~all" no quotes. Anyone got any idea what might be happening? Regards Ian -- Ian Hobson Tel (+66) 626 544 695