On 01.06.20 09:09, Gabriele Bulfon wrote:
That is impossible, there is more than 1TB of free space on the zfs pool where postfix queue is allocated. If I had so little space, I would have ran into other troubles long before this strange problem. This system is delivering continuously 24/7 thousands of email per day. This is something that started to happen sporadically in the last few months, after year of works. What may be misleading Postfix about my available space?
are you sure there is no other filesystem involved? I don't know much about ZFS, aren't there any partitions limited in size? There's slight possibility that free size is understood incorrectly...
On 29.05.20 15:42, Gabriele Bulfon wrote: This in mail.log: May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 197553 mail.info] connect from sender-host[*.*.*.*] May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 197553 mail.info] Anonymous TLS connection established from sender-host[*.*.*.*]: TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits) May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 197553 mail.info] NOQUEUE: reject: MAIL from sender-host[*.*.*.*]: 452 4.3.1 Insufficient system storage; proto=ESMTP helo= May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 947731 mail.warning] warning: not enough free space in mail queue: 38384640 bytes This last warning looks quite uncomprehensible, message size limit is 50000000, and sure 38384640 is less than 1.5*msl, so what's the problem? _that_ is apparently the problem. you have 38384640 B (~38MB) of free space in queue, but message maximum size is 50MB, so you don't have enough of free space for maximum message size, not even for 1.5*maximum required by default: http://www.postfix.org/postconf.5.html#queue_minfree
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