I'm having problems sending to a server that appears to be running Exim 4.5x, and uses callout address verification, because our MX - with Exim 4.34 - rejects the callback connection. Actually, I've mentioned this before, but I hadn't tracked down the exact failure, then. Now, after manipulating the log options a bit, I've been able to obtain more info, and it seems like the problem is that our server thinks there is an SMTP synchronisation error. The following sequence of (slightly rewritten) log messages should make it clear how the failure occurs:
13:26:21 SMTP connection from [192.168.0.186] (TCP/IP connection count = 2) 13:26:51 1FndOG-004OJa-C1 == [EMAIL PROTECTED] R=lookuphost T=remote_smtp defer (0): SMTP error from remote mailer after RCPT TO:<[EMAIL PROTECTED]>: host example.com [192.168.0.186]: 451 Could not complete sender verify callout 13:26:51 SMTP protocol violation: synchronization error (input sent without waiting for greeting): rejected connection from H=server6.example.com [192.168.0.186] So what exactly is wrong here? Is this a problem with our server, or at the other end? Is there any way I can get around this problem? - Toralf -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
