[exim] Recall a message

Hello I would like to enable the "recall message in exim" feature. Now, when I try to recall, deleting the old message sent, and replacing it with the new message, I notice that the new message is sent but the old message always stays with the recipient while I want it to be permanently deleted

[exim] PLAIN authenticator failed... malformed parameter setting precedes LDAP URL

Hello Everyone I am unable to authenticate my users from public IP adresses. This is the message when i Try to test my SMTP authentication trought LDAP : PLAIN authenticator failed for .. (.com) [192.168.10.2]: 435 Unable to authenticate at present (set_id=c2RpYXJyYQ==): malformed