----- Original Message -----
| From: "Al Iverson via mailop" <mailop@mailop.org>
| To: mailop@mailop.org
| Sent: Friday, June 27, 2025 4:29:13 PM
| Subject: Re: [mailop] Checking existence of recipients
<snip>
| 
| And the whole topic raised here doesn't even feel operational to me.
| Whether or not somebody SMTP verifies email addresses or not, why they
| can't just simply implement double opt-in, whether or not the next
| mail attempt to the recipient in questions bounces, nothing here feels
| operational in nature. These feel like strategic business or marketing
| related considerations. There's no way that any choice picked here
| significantly impacts the operational uptime of a mail server.
<snip>
| 
| Al Iverson // 312-725-0130 // Chicago
| http://www.spamresource.com // Deliverability
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To be fair, someone did bring up VRFY, which I guess is operational, and which 
we turn off on every system we build. :-)

But yes, I agree that double opt-in is really the only way to go these days.

Regards, 
Mark 

-- 
_________________________________________________________________ 
L. Mark Stone, Founder 
North America's Leading Zimbra VAR/BSP/Training Partner 
For Companies With Mission-Critical Email Needs 
Winner of the Zimbra Americas VAR Partner of the Year - Two Years Running !
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