Re: How is EAI mail implemented ?

On Tue, Jun 15, 2021, John R Levine wrote:

> Nobody I've seen tags messages as EAI in their internal queues.

sendmail does:
writing: queueup()
	/* send various flag bits through */
...
	if (e->e_smtputf8)
		*p++ = 'e';

reading: readqf()
...
	  case 'e':	/* message requires EAI */
		e->e_smtputf8 = true;

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