Curtis Vaughan via Postfix-users:
> delay=52012, delays=51997/0/15/0, dsn=4.4.2, status=deferred
> (conversation with satcomdv.ru[83.222.5.141] timed out while receiving
> the initial server greeting)
Upon closer reading the time limit for the greeting is set with
smtp_helo_timeout (default: 300s). See source code below.
You have somehow configured smtp_helo_timeout to time out
after 15 seconds. If not in main.cf, then in master.cf.
Wietse
The first code block sets up a timeout, and code that runs when the
code in the second block times out.
smtp_stream_setup(state->session->stream, var_smtp_helo_tmout,
var_smtp_req_deadline, 0);
if ((except = vstream_setjmp(state->session->stream)) != 0)
return (smtp_stream_except(state, except, where));
The second block attempts to read the server greeting, and makes a
long jump to the first block after EOF, timeout, or other error.
/*
* Read and parse the server's SMTP greeting banner.
*/
where = "receiving the initial server greeting";
switch ((resp = smtp_chat_resp(session))->code / 100) {
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