On Thu, Oct 19, 2017 at 11:19:53AM +0200, Charlie Elgholm wrote: > * 2017-10-18 11:42:23 1e4kjd-0006nY-4L SMTP error from remote mail > server after pipelined sending data block: 421 RP-001 (COL004-MC3F9) > Unfortunately, some messages from <ip> weren't sent. Please try again. > We have limits for how many messages can be sent per hour and per day. > You can also refer to > http://mail.live.com/mail/troubleshooting.aspx#errors.
Microsoft guys are doing wrong thing. They should reject connections for specific ip-address, or return 4xx in place of greeting message and on MAIL, shuch errors could be treated as host-specific rejections. If status-codes 4xx are emitted on RCPT stage, such rejections are recipient-specific, so Exim could try other mails for the same MX. This log fragment looks like response to DATA, with pipelining on. It's a bad idea to put the ip-address rejection here. Legal 4xx response to DATA may be caused by problems with disk space, memory, system-wide filter (antivirus, ex) hangup on the receiver host. All these conditions are not related to specific recipient. So I think Exim havŠµ better to treat 4xx on DATA as host-specific. -- Eugene Berdnikov -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
