Re: Postfix says "Cannot start TLS: handshake failure" when try to send to Exchange 2007 Server

0.0.1[127.0.0.1]:10026, delay=0.24, delays=0.1/0/0.04/0.09, >> dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 56253920A60) Nov 30 >> 15:29:40 smarthost04-ded postfix-out/smtp[9312]: 56253920A60: Cannot >> start TLS: handshake failure Nov 30 15:29:40 smarthost04-ded >> pos

Re: Postfix says "Cannot start TLS: handshake failure" when try to send to Exchange 2007 Server

On 30 Nov 2020, at 12:07, SysAdmin EM wrote: > TLS: handshake failure Nov 30 15:29:40 smarthost04-ded > I have read the documentation but I cannot understand why this error occurs. Because the server running thirteen year old software does not support valid encryption methods. Here is an

Re: Cannot start TLS: handshake failure

On Mon, Nov 30, 2020 at 04:44:17PM -0300, SysAdmin EM wrote: > It seems strange to me because the connection was working correctly and no > changes have been made to the settings. The *remote* server is malfunctioning, so your settings are largely irrelevant. > Here the configuration of the

Re: Cannot start TLS: handshake failure

nov. de 2020 a la(s) 16:20, Viktor Dukhovni ( postfix-us...@dukhovni.org) escribió: > On Mon, Nov 30, 2020 at 02:50:43PM -0300, SysAdmin EM wrote: > > > Nov 30 14:43:58 smarthost04-ded postfix-out/smtp[31323]: 0F6EE920CBC: > > Cannot start TLS: handshake failure > > Nov 30

Re: Cannot start TLS: handshake failure

On Mon, Nov 30, 2020 at 02:50:43PM -0300, SysAdmin EM wrote: > Nov 30 14:43:58 smarthost04-ded postfix-out/smtp[31323]: 0F6EE920CBC: > Cannot start TLS: handshake failure > Nov 30 14:43:58 smarthost04-ded postfix-out/smtp[31323]: 0F6EE920CBC: to=< > fvid...@exchange.infoauto.com.ar

Postfix says "Cannot start TLS: handshake failure" when try to send to Exchange 2007 Server

ost04-ded postfix-out/smtp[9312]: 56253920A60: Cannot > start TLS: handshake failure Nov 30 15:29:40 smarthost04-ded > postfix-out/smtp[9312]: 56253920A60: > to=, > relay=exet02.hostmar.com[200.58.120.69]:25, delay=0.12, > delays=0.09/0/0.03/0, dsn=4.7.5, status=deferred (Cannot sta

Cannot start TLS: handshake failure

Hello, When trying to send an email to a server which works with Microsoft Exchange I receive the following message: Cannot start TLS: handshake failure Nov 30 14:43:58 smarthost04-ded postfix-out/smtpd[31559]: 0F6EE920CBC: client=localhost[127.0.0.1] Nov 30 14:43:58 smarthost04-ded postfix-out

Re: detecting TLS issues in delivery - Cannot start TLS: handshake failure

> On Jan 16, 2019, at 3:24 PM, Stefan Bauer wrote: > > "Some sites may blacklist you when you are probing them too often (a probe is > an SMTP session that does not deliver mail), or when you are probing them too > often for a non-existent address. This is one reason why you should use >

Re: detecting TLS issues in delivery - Cannot start TLS: handshake failure

"Some sites may blacklist you when you are probing them too often (a probe is an SMTP session that does not deliver mail), or when you are probing them too often for a non-existent address. This is one reason why you should use sender address verification sparingly, if at all, when your site

Re: detecting TLS issues in delivery - Cannot start TLS: handshake failure

> On Jan 16, 2019, at 9:56 AM, Wietse Venema wrote: > >> reject_unverified_recipient is no option as remote sites don't like >> probing/verify requests. After rechecking, i had a typo in my regex. > > reject_unverified RECIPIENT, not reject_unverified_SENDER Specifically, because it would be

Re: detecting TLS issues in delivery - Cannot start TLS: handshake failure

; > > > > -- 880 Kbytes in 3 Requests. > > > root@mx1:~# mailq > > > -Queue ID- --Size-- Arrival Time -Sender/Recipient--- > > > A97288008B 776694 Sun Jan 13 13:14:29 sender@sender > > > (Cannot st

Re: detecting TLS issues in delivery - Cannot start TLS: handshake failure

gt; > A97288008B 776694 Sun Jan 13 13:14:29 sender@sender > > (Cannot start TLS: handshake > > failure) > > http://www.postfix.org/postconf.5.html#reject_unverified_recipient. > > > Jan 15 14:23:01 mx1 smtp[5985]: SSL_connect error

Re: detecting TLS issues in delivery - Cannot start TLS: handshake failure

Sun Jan 13 13:14:29 sender@sender > (Cannot start TLS: handshake > failure) http://www.postfix.org/postconf.5.html#reject_unverified_recipient. > Jan 15 14:23:01 mx1 smtp[5985]: SSL_connect error to recipient.tld[ip]:25: > -1 > Jan 15 14:

detecting TLS issues in delivery - Cannot start TLS: handshake failure

(Cannot start TLS: handshake failure) recipient@recipient Jan 15 14:23:01 mx1 smtp[5985]: SSL_connect error to recipient.tld[ip]:25: -1 Jan 15 14:23:01 mx1 smtp[5985]: warning: TLS library problem: error:141A318A:SSL

Re: Postfix cannot start tls: handshake failure

ade in Postfix sets a "floor" on the ciphers used, that > is only medium or better. Nobody is "making them medium": > > http://www.postfix.org/postconf.5.html#smtp_tls_ciphers > > -- > Viktor. Appreciate your input, Viktor. Than you. -- View this

Re: Postfix cannot start tls: handshake failure

> On Mar 30, 2017, at 12:03 AM, Den1 wrote: > >> smtp_tls_ciphers = medium >> smtp_tls_exclude_ciphers = >> MD5,SRP,PSK,aDSS,kECDH,kDH,SEED,IDEA,RC2,RC5,RC4 > > Why would you exclude these ciphers Because: * MD5 is weak, obsolete and unnecessary * SRP and PSK

RE: Postfix cannot start tls: handshake failure

1664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-tp89684p89748.html Sent from the Postfix Users mailing list archive at Nabble.com.

Re: Postfix cannot start tls: handshake failure

On Wed, Mar 29, 2017 at 05:03:51AM -0700, Den1 wrote: > I was wondering is it actually advisable to use tls on smtp? When I tried it > out with my self-signed certificates just to see if it's of any convenience > to implement this feature I received the following response: > > TLS required, but

Re: Postfix cannot start tls: handshake failure

On Wed, Mar 29, 2017 at 04:14:35AM -0700, oakley wrote: > *openssl s_client -connect (mydomain.com):443 -servername (mydomain.com)* > Why on earth are you wasting our time showing results of connections to an HTTPS service. In every message you post, show the current *Postfix* configuration,

RE: Postfix cannot start tls: handshake failure

not the same for smtp as it works for me with 'may', but it's quite different with encrypt or secure. -- View this message in context: http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-tp89684p89733.html Sent from the Postfix Users mailing list archive at Nabble.com.

RE: Postfix cannot start tls: handshake failure

> -Oorspronkelijk bericht- > Van: webmas...@lshipping.info [mailto:owner-postfix-us...@postfix.org] > Namens Den1 > Verzonden: woensdag 29 maart 2017 14:50 > Aan: postfix-users@postfix.org > Onderwerp: RE: Postfix cannot start tls: handshake failure > > Hi Louis, > > Thank you f

RE: Postfix cannot start tls: handshake failure

Hi Louis, Thank you for your input, I appreciate. I have smtpd running OK with all the key_file, cert_file and so on. I was asking about smtp. These two are different :-) -- View this message in context: http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure

RE: Postfix cannot start tls: handshake failure

mens Den1 > Verzonden: woensdag 29 maart 2017 14:04 > Aan: postfix-users@postfix.org > Onderwerp: Re: Postfix cannot start tls: handshake failure > > I was wondering is it actually advisable to use tls on smtp? When I tried > it > out with my self-signed certificates just to se

Re: Postfix cannot start tls: handshake failure

any thanks! -- View this message in context: http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-tp89684p89727.html Sent from the Postfix Users mailing list archive at Nabble.com.

Re: Postfix cannot start tls: handshake failure

te this all went down hill, too. Do you think this has a possibility? -- View this message in context: http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-tp89684p89726.html Sent from the Postfix Users mailing list archive at Nabble.com.

Re: Postfix cannot start tls: handshake failure

> On Mar 27, 2017, at 3:26 PM, oakley wrote: > > I'm now using port 25. Perhaps. But logging associated failure is more useful than just noting this claim. > I've tested to see if my firewall or what ever was blocking it, but I can > connect when I tested via; > > $

Re: Postfix cannot start tls: handshake failure

in context: http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-tp89684p89703.html Sent from the Postfix Users mailing list archive at Nabble.com.

Re: (Cannot start TLS: handshake failure) - Please help

> On Mar 27, 2017, at 1:09 PM, Mark Wise <femarkw...@gmail.com> wrote: > > Really sorry. > http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-td89684.html You'll need to join the postfix-users list via majord...@postfix.org, as explained at http

Re: Postfix cannot start tls: handshake failure

this message in context: http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-tp89684p89697.html Sent from the Postfix Users mailing list archive at Nabble.com.

Re: Postfix cannot start tls: handshake failure

> On Mar 27, 2017, at 1:51 PM, oakley wrote: > > Appreciate the reply, Viktor. I've done everything you've suggested... Not quite, as you're not connecting to the right relay service. Do check an authoritative source on what relayhost you're supposed to use. > This is

Re: Postfix cannot start tls: handshake failure

caldomain> localhost postfix/qmgr[5012]: B3A80BEF2F: from=, size=287, nrcpt=1 (queue active) localhost postfix/smtp[4700]: SSL_connect error to email-smtp.eu-west-1.amazonaws.com[54.154.210.139]:465: Connection timed out localhost postfix/smtp[4700]: E969BBEF28: Cannot start TLS: hands

Re: Postfix cannot start tls: handshake failure

VER_HELLO: > unknown protocol:s23_clnt.c:794:93591BEF30: > Cannot start TLS: handshake failure > > relayhost = [email-smtp.eu-west-1.amazonaws.com]:25 Double check that this is the correct relay to use. Typically, providers operate SMTP submission services on port 587 (STARTTLS) or

Postfix cannot start tls: handshake failure

[52.51.114.192]:25: -1 localhost postfix/smtp[2100]: warning: TLS library problem: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:794: 93591BEF30: Cannot start TLS: handshake failure -- HERE ARE CONTENTS OF MY MAIN.CF for postfix: -- # See /usr

Re: Cannot start TLS: handshake failure when relaying through Exchange 2007

/Cannot-start-TLS-handshake-failure-when-relaying-through-Exchange-2007-tp86243p86258.html Sent from the Postfix Users mailing list archive at Nabble.com.

Re: Cannot start TLS: handshake failure when relaying through Exchange 2007

postfix/smtp[10382]: 32D975004EE: Cannot start > TLS: handshake failure > [ ... start of server connection details ... ] > New, TLSv1/SSLv3, Cipher is RC4-MD5 > Secure Renegotiation IS NOT supported > Protocol : TLSv1 > Cipher: RC4-MD5 Note that your server's idea of "op

Re: Cannot start TLS: handshake failure when relaying through Exchange 2007

re has a special alias that forwards email from the specified destination account to a perl script that creates/updates a ticket -- View this message in context: http://postfix.1071664.n5.nabble.com/Cannot-start-TLS-handshake-failure-when-relaying-through-Exchange-2007-tp86243p86245.html Sen

Cannot start TLS: handshake failure when relaying through Exchange 2007

fix/smtp[10382]: 32D975004EE: Cannot start TLS: handshake failure Sep 14 11:52:54 mar-zabbix postfix/smtp[10375]: SSL_connect error to mar-exch01.mydomain.com[192.168.100.223]:25: lost connection Sep 14 11:52:54 mar-zabbix postfix/smtp[10375]: 0891F5006D1: Cannot start TLS: handshake failure Sep

Cannot Start TLS: handshake failure (openssl command succeed)

Dears, Currently my postfix need to delivery mails to exchange 2003 and encounter handshake failure issue when setting up the TLS connection. posttls-finger failed but openssl succeeded. The remote exchange only support cipher: RC4-SHA. The RC4-SHA is 71st place on the cipher list. And

Re: Cannot Start TLS: handshake failure (openssl command succeed)

On 2015-05-20 11:32, King Cao wrote: Dears, Hi, Currently my postfix need to delivery mails to exchange 2003 and encounter handshake failure issue when setting up the TLS connection. posttls-finger failed but openssl succeeded. The remote exchange only support cipher: RC4-SHA. The RC4-SHA

Re: Cannot Start TLS: handshake failure

On Fri, May 01, 2015 at 04:51:03AM +, Viktor Dukhovni wrote: For this server, you need a more compact cipherlist as a work-around. smtp_tls_exclude_ciphers = # # Disable MD5, DSA, SRP and PSK, and the exotic fixed DH cipher suites. #

Re: Cannot Start TLS: handshake failure

On May 1, 2015, at 12:01 AM, Viktor Dukhovni postfix-us...@dukhovni.org wrote: On Fri, May 01, 2015 at 04:51:03AM +, Viktor Dukhovni wrote: For this server, you need a more compact cipherlist as a work-around. smtp_tls_exclude_ciphers = # #

Re: Cannot Start TLS: handshake failure

On Thu, Apr 30, 2015 at 08:28:21PM -0700, Tom Johnson wrote: That aside, even with the wrong MX host, I still get successful connections. Perhaps you're behind some sort of firewall that proxies TLS and disconnects when it does not like the peer certificate: $ posttls-finger -c

Re: Cannot Start TLS: handshake failure

=mail.mlmatthews.com[23.25.38.217]:25, delay=8.8, \ delays=8.5/0.26/0.05/0, dsn=4.7.5, status=undeliverable-but-not-cached (Cannot \ start TLS: handshake failure) That aside, even with the wrong MX host, I still get successful connections. Perhaps you're behind some sort of firewall

Cannot Start TLS: handshake failure

I have a basic postfix setup that's been working fine for a long time, but recently, I've been seeing errors with a number of sites: Cannot start TLS: handshake failure Here are some specific sites where I'm seeing this issue: SSL_connect error to 23.25.38.217 [23.25.38.217

Re: Cannot Start TLS: handshake failure

On Wed, Apr 29, 2015 at 05:57:36PM -0700, Tom Johnson wrote: I have a basic postfix setup that's been working fine for a long time, but recently, I've been seeing errors with a number of sites: Cannot start TLS: handshake failure Here are some specific sites where I'm seeing

Re: Re: For getway relay-only situation getting Cannot start TLS: handshake failure. Can I get more details from only my server end?

Hello Viktor Your logs are too verbose. This just hides the real problem in a torrent of noise. This surprised me because we alway increase the logging when there is trouble right?  But it was the most help! Resolving TLS handshake problems requires full-package PCAP captures and

Re: For getway relay-only situation getting Cannot start TLS: handshake failure. Can I get more details from only my server end?

, the error is Cannot start TLS: handshake failure. Of course if I see logs in great detail for my servers and his domain then I can do the troubleshooting. Your logs are too verbose. This just hides the real problem in a torrent of noise. Jan 25 04:27:25 srchmx postfix/smtp[17317]: setting up TLS