Last days we can see a lot of SMTP_DELIV_FAILED in our logfiles Looks like there are out many mailservers using a spamfilter solution that blocks all incoming smtp traffic if the sender domain cannot be resolved.
So we've found out that one of our domains has a missing dns entry. Ok resolved. But there is also another problem: We set up all our virtual mail hosts in the form mail.clientdomain.com and the alias clientdomain.com So all webmail users have a default sender address of [EMAIL PROTECTED] Now all messages send from webmail with the default sender address are blocked from this receiving mailservers. Solution: A.) Manualy remove the "mail." for every mailbox user B.) Add an A- or CNAM-Record "mail" to any DNS-zone of all clientdomains Any suggestions? So it's now legit to block any mail having an invalid sender domain or is this the "idiots way to filter spam" ? Markus --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
