著者: Darren Mackay - Lists 日付: To: exim-users 題目: RE: [Exim] Access denied error and retries
Hi,
| However, if you upgrade to 3.22 (the latest release) you will find also
| that another change has been applied: | | 9. Exim was treating a 5xx response on connection to an SMTP server, or in
| response to HELO, in the same way as a connection failure - that is, as a
| temporary error, causing the message to be tried again later. It now bounces | all the addresses in these situations. | | This will cause your messages to bounce. The problem is in the remote
| server. It should not be giving a 5xx error for a temporary problem. It
| should be giving a 4xx error. The RFCs are quite clear that a 5xx error
| means "permanent error; do not try again".
So are you are saying that upgrading to exim v3.22 will actually bounce the
messages rther than attempting delivery on an alternate smarthost? If this
is the case this would in fact create quite a problem with users compalining
mail is bouncing just because the ISP uses an MTA that does not fully
conform to the RFCs (it is also very unlikely that the ISP will change their
MTA either - they are using a custom version of sendmail I believe).