Hi Guys,
I have following router which require secure delivery to some domains. If a
TLS delivery fail then email deliver to MY_FALLBACK host.
router_require_tls:
driver = dnslookup
domains = +tlsdomains
transport = smtp_require_tls
smtp_require_tls:
driver = smtp
delay_after_cutoff = false
hosts_require_tls = *
fallback_hosts = MY_FALLBACK
This configuration works well. But today i found in logs unexpected
behavior.
A recipients domain reject with 451 after established STARTTLS. This is
their graylist. Because of that error exim deliver email to fallback host.
But I suppose that exim should retry delivery and not send to the fallback
immediately.
Is there some other configuration option which can help me?
Here is an example of smtp session:
seconds test stage and result
[000.075] <-- 220 mx1.domain.com ESMTP
[000.076] --> EHLO sender.com
[000.113] <-- 250-mx1.domain.com Hello [sender.com]
250-AUTH LOGIN
250-AUTH=LOGIN
250-STARTTLS
250 HELP
[000.114] --> STARTTLS
[000.150] <-- 220 Starting TLS
[000.151] STARTTLS command works on this server
[000.359] SSLVersion in use: TLSv1.2
[000.359] Cipher in use: ECDHE-RSA-AES128-SHA
[000.360] Connection converted to SSL
[000.434] Cert VALIDATED: ok
[000.435] ~~> EHLO sender.com
[000.474] <~~ 250-mx1.domain.com Hello [sender.com]
250-AUTH LOGIN
250-AUTH=LOGIN
250 HELP
[000.474] TLS successfully started on this server
[000.475] ~~> MAIL FROM:<test@???>
[000.512] <~~ 250 OK
[000.513] ~~> RCPT TO:<rcpt@???>
[000.756] <~~ 451 Internal resource temporarily unavailable
[000.757] ~~> QUIT
[000.794] <~~ 221 Service closing transmission channel
Thanks.
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