Some do, like Thunderbird. Some don't, I'm told. The particular client I usually use, 'mutt', doesn't respond to them at all. (Yes, it's a crusade. One of the very few principles of mine that the modern internet hasn't destroyed yet.) - Brian
On Fri, Mar 29, 2019 at 01:07:09AM -0700, Ron Economos via 44Net wrote:
Just curious, but don't e-mail clients ask you whether you want to send the acknowledgement or not? I know Thunderbird asks.
Ron W6RZ
On 3/29/19 00:31, Brian Kantor wrote:
Oh, I see.
The mail you are trying to deliver to me has a "Disposition Notification To" header line in it. This is a common trick used by spammers to prospect for valid mailboxes, because its purpose is to send the message sender an acknowledgement as soon as the message is opened by the recipient, whether the recipient wants to tell you that they've looked at your message or not.
I don't allow mail wanting those acknowledgement messages because I believe they are a privacy violation, so yours is getting rejected.
Delete that line from your email header and you'll get through just fine.
- Brian
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