https://check.smtp.bz/
6.8. Base64 Content-Transfer-Encoding
The encoded output stream must be represented in lines of no more than 76 characters each.
recipient user1@sub.domain.ru: not found in virtual_uid_maps
Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'
SENDER="<$1>"
SHIFT=1
:0 c
* ^To:.*user@example.org
{
:0 c
* ^From:.*user@server1.ru
! -oi -f "$SENDER" spy@example.org
:0
* ^From:.*user@server2.ru
! -oi -f "$SENDER" spy@example.org
}
:0
! -oi -f "$SENDER" "$@"