If there's a mail admin from canterbury.ac.nz on list, could you have a quick look at your server? We're not seeing mail coming from you because your server doesn't come back to have another go. We run a 10 minute greylist timer but you don't seem to come back for another go. # grep canterbury.ac.nz mail.log May 24 21:46:04 mx postfix/smtpd[22652]: connect from cantva.canterbury.ac.nz[132.181.2.27] May 24 21:46:05 mx tumgreyspf[22740]: Initial greylisting: REMOTEIP="132.181.2.27" HELO="cantva.canterbury.ac.nz" SENDER="stephen.hickson(a)canterbury.ac.nz" RECIPIENT="don(a)bowenvale.co.nz" QUEUEID="" May 24 21:46:05 mx postfix/smtpd[22652]: NOQUEUE: reject: RCPT from cantva.canterbury.ac.nz[132.181.2.27]: 450 4.7.1 <stephen.hickson(a)canterbury.ac.nz>: Sender address rejected: Service unavailable, greylisted (http://projects.puremagic.com/greylisting/).; from=<stephen.hickson(a)canterbury.ac.nz> to=<don(a)bowenvale.co.nz> proto=ESMTP helo=<cantva.canterbury.ac.nz> TIA. D -- Don Gould 31 Acheson Ave Mairehau Christchurch, New Zealand Ph: + 64 3 348 7235 Mobile: + 64 21 114 0699 Ph: +61 3 9111 1821 (Melb) www.thinkdesignprint.co.nz skype: don.gould.nz