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Issue Mail broken after Obsidian upgrade

marcussf

New Pleskian
I have upgraded to Obsidian 18.0.36 on a Debian 9.13 x64 system - which broke both postfix and dovecot / imapproxy

I was able to fix the immediate postfix issue, namely the milter service not being available. However, mail to accounts administered through Plesk are not being accepted:
Jul 1 13:28:26 myhost postfix/pipe[12142]: 147C7A51F02: to=<[email protected]>, relay=mailman, delay=0.58, delays=0.53/0.02/0/0.03, dsn=5.3.0, status=bounced (Command died with status 6: "/usr/lib/plesk-9.0/postfix-mailman". Command output: Illegal command: mydomain.com )

Dovecot does not seem to accept Plesk auth services any more:
Jul 1 13:49:47 myhost dovecot: auth: Fatal: Unknown passdb driver 'plesk'
Jul 1 13:49:47 myhost dovecot: master: Error: service(auth): command startup failed, throttling for 60.000 secs
Jul 1 13:49:47 myhost dovecot: imap-login: Disconnected: Auth process broken (disconnected before auth was ready, waited 0 secs): user=<>, rip=2001::10, lip=2001::11, TLS handshaking, session=<uOibbw7GHLcgAUC4AAADEgAAAAAAAEMA>

Consequently, imapproxyd refuses to start:
Jul 1 13:48:13 myhost in.imapproxyd[13122]: ParseBannerAndCapability: Attempting to parse capability string: * BYE Disconnected: Auth process broken
Jul 1 13:48:13 myhost in.imapproxyd[13122]: SetBannerAndCapability(): Unexpected response from IMAP server on initial connection: * BYE Disconnected: Auth process broken#015#012 -- Exiting.

'plesk repair mail' does nothing: Error messages: 0; Warnings: 0; Errors resolved: 0
 
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