forked from pool/fetchmail
45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
# Patches fetchmail's behaviour for SMTP servers which:
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# 1) insist on using TLS - we do not want messages which cannot
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# be sent due to server negotiation problems lost - rather we
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# keep them on the mailserver. As users should realize rather
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# quickly that something went wrong, the overhead shouldn't
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# be considered that important.
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# 2) use the 501 error code to mark spam - in such a case
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# the 'antispam' option should be used
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--- fetchmail-6.3.8.orig/sink.c 2007-03-30 00:45:17.000000000 +0200
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+++ fetchmail-6.3.8/sink.c 2007-09-25 17:37:49.332165910 +0200
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@@ -535,7 +535,32 @@
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free(responses[0]);
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return(PS_REFUSED);
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- default:
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+ case 530: /* must issue STARTTLS error */
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+ /*
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+ * Some SMTP servers insist on encrypted communication
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+ * Let's set PS_TRANSIENT, otherwise all messages to be sent
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+ * over such server would be blackholed
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+ */
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+ free(responses[0]);
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+ if (outlevel > O_SILENT)
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+ report_complete(stdout,
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+ GT_(" SMTP server requires STARTTLS, keeping message.\n"));
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+ return(PS_TRANSIENT);
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+
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+ case 501: /* Syntax error in parameters or arguments */
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+ /*
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+ * Some SMTP servers use this error code to refuse spam, however
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+ * as we don't want to delete message if e.g. the address is (possibly
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+ * by mistake) malformed, user has to use the 'antispam' option to
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+ * treat this as spam symptom
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+ */
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+ free(responses[0]);
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+ if (outlevel > O_SILENT)
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+ report_complete(stdout,
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+ GT_(" SMTP 501 error - if the server uses this code to report spam, include '501' in the 'antispam' option .\n"));
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+ return(PS_TRANSIENT);
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+
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+ default:
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/* bounce non-transient errors back to the sender */
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if (smtperr >= 500 && smtperr <= 599)
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{
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