[Solved] Delivered mail (250 2.1.5 Delivery OK) not showing in mailbox for one user

New install. Yesterday email outgoing and incoming was working for all users. Today the main user (Me!) account cannot receive or rather see new mail.

here is an excerpt from the logs;

Jan 5 16:43:17 mailgate-bkm-5 postfix/cleanup[1895788]: 1CAAA1406CC: message-id=<190e7913-f919-46d0-a0c9-8fe8c9239b90@customerdomain.com>
Jan 5 16:43:17 mailgate-bkm-5 postfix/qmgr[1894465]: 1CAAA1406CC: from=<someone@customerdomain.com>, size=22375, nrcpt=1 (queue active)
Jan 5 16:43:17 mailgate-bkm-5 postfix/smtp[1895789]: 857BB1405BD: to=<me@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=7.7, delays=0.18/0.02/0.01/7.5, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 1CAAA1406CC)
Jan 5 16:43:17 mailgate-bkm-5 postfix/qmgr[1894465]: 857BB1405BD: removed
Jan 5 16:43:18 mailgate-bkm-5 postfix/lmtp[1895815]: 1CAAA1406CC: to=<me@mydomain.com>, relay=mailgate-bkm-5.end-design.co.uk[62.3.100.122]:7025, delay=0.97, delays=0.01/0.05/0.48/0.42, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jan 5 16:43:18 mailgate-bkm-5 postfix/qmgr[1894465]: 1CAAA1406CC: removed

I can log in to the account and see all the mail to date both read and unread, hoverver nothing since last night despite a number of 'successful' deliveries since including the one above.

I tried re-starting re-booting testing with amavis disabled, but I do not get these emails

any thoughts?

regards

Simon