Hello Dovecot List,

Our upgrade from Debian 9 Dovecot 2.2.27 to Debian 13 Dovecot 2.4.1 went well.

Only recently we added a new mailbox and LMTP delivery failed.

Dovecot redacted error from Postfix log: 451 4.2.0 <user@domain> Temporarily unable to access necessary Sieve scripts (in reply to end of DATA command))

Dovecot redacted errors from Dovecot log: dovecot[736]: lmtp(user@domain): Error: sieve: file storage: Performing t_readlink() on active sieve symlink '(null)' failed: readlink() failed: Bad address dovecot[736]: lmtp(user@domain): Error: sieve: Failed to access active Sieve script in parsonal storage 'default': Internal error occurred. Refer to server log for more information. [2026-08-13] (temporary failure)

LMTP delivery works after manually creating ~/sieve directory with correct permissions.

I know a PostfixAdmin postcreation script can automate directory creation.

Have I overlooked Dovecot setting to have Dovecot create ~/sieve directory during LMTP delivery?

Best regards, Conrad T. Pino