Re: Avoiding mail loops

The usual way to do loop detection is to parse the Received headers. Look for your host appearing multiple times and you'll have spotted a loop.

-sam

Comment on Re: Avoiding mail loops

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Re^2: Avoiding mail loops by varian (Chaplain) on Jun 16, 2007 at 08:03 UTC
Using the Received field can lead to false positives when one uses multiple MTA's within the same domain. The proper method is to add a custom header to the email and for incoming emails detect if that particular header is present (if so, then you have a loop condition). Custom header names should start with 'X-' so as not to conflict with predefined names, e.g. `X-Loop: cormanaz@domain.tld` [download]	[reply] [d/l]

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Re^2: Avoiding mail loops
by varian (Chaplain) on Jun 16, 2007 at 08:03 UTC

The proper method is to add a custom header to the email and for incoming emails detect if that particular header is present (if so, then you have a loop condition).

Custom header names should start with 'X-' so as not to conflict with predefined names, e.g.

X-Loop: cormanaz@domain.tld
[download]

[reply]
[d/l]