It seems that message payload arrives truncated during read operation performed by notifyd.
I placed a debug message in imap/notify.c (notify-234), before writing to the socket, and another one in notifyd/notifyd.c (notifyd-170), after reading data and just before actually performing the notification using the choosen type.
2023-02-22 10:59:13 xstreamos cyrus/imaps[11940]: [ID 944875 local6.debug] notify-234: {"event":"vnd.cmu.MessageMove","timestamp":"2023-02-22T10:59:13.247+01:00","oldMailboxID":"imap://xstreamos/user/gabriele.bulfon%40xstreamos.org;UIDVALIDITY=1676368622","vnd.cmu.oldUidset":"46","mailboxID":"3f5dfd40-41e2-e952-b9bf-95c1b41be15b","uri":"imap://xstreamos/user/gabriele.bulfon/Junk%40xstreamos.org;UIDVALIDITY=1676469851","uidset":"34","pid":11940,"user":"gabriele.bulfon@xxxxxxxxxxxxx","vnd.cmu.mbtype":"el","serverFQDN":"xstreamos","vnd.cmu.mailboxACL":"gabriele.bulfon@xxxxxxxxxxxxx\tlrswipkxtecdan\tcyrus\tlrswipkxtecda\t"} 2023-02-22 10:59:13 xstreamos cyrus/notify[11936]: [ID 921384 local6.debug] accepted connection 2023-02-22 10:59:13 xstreamos cyrus/notify[11936]: [ID 450945 local6.debug] notifyd-170: {"event":"vnd.cmu.MessageMove","timestamp":"2023-02-22T10:59:13.247+01:00","oldMailboxID":"imap://xstreamos/user/gabriele.bulfon%40xstreamos.org;UIDVALIDITY=1676368622","vnd.cmu.oldUidset":"46","mailboxID":"3f5dfd40-41e2-e952-b9bf-95c1b41be15b","uri":"imap://xstreamos/user/gabriele.bulfon/Junk%40xstreamos.org;UIDVALIDITY=1676469851","uidset":"34","pid":11940,"user":"gabriele.bulfon@xxxxxxxxxxxxx","vnd.cmu.mbtype":"el","serverFQDN":"xstreamos","vnd.cmu.mail 2023-02-22 10:59:13 xstreamos cyrus/notify[11936]: [ID 414469 local6.debug] do_notify using method 'external'
Do you have any suggestion about this behaviour?
Thank you,
Matteo
