lmtp - Robuta Search

https://dovecot.org/pipermail/dovecot-cvs/2014-November/025241.html

https://dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thread/JYJL67JFOUIMKSCZBN2SUJ22P5XVGU3Z/

https://dovecot.org/list/dovecot/2016-December/106540.html

https://dovecot.org/list/dovecot/2018-December/114047.html

https://dovecot.org/list/dovecot/2016-December/106399.html

https://dovecot.org/list/dovecot/2013-August/091860.html

https://dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thread/BBHSDH657I3SFTXOM2DEJYZR3R7W3R7E/

https://dovecot.org/list/dovecot/2015-November/102479.html

https://dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thread/N27W3S77XR3LWXMZMO47LUMA7ECIHLCE/

https://dovecot.org/list/dovecot/2013-June/090723.html

https://dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thread/D7VQVFDLOVCFE63X7QJ7GMHYNFMQNG4M/

https://dovecot.org/list/dovecot/2014-May/095857.html