Re: [CentOS] Sendmail - STARTTLS not appear on one client

[Radu Radutiu]

On Fri, Nov 28, 2008 at 11:30 PM, happymaster23 [EMAIL PROTECTED] wrote:
 Hi,

 I have Sendmail configured to use STARTTLS for authentication. On all
 internet connections and computers (that I have tested) works
 connection over encrypted SMTP flawlessly. Today I was setting up mail
 client on PC of my customer and standardily checked boxes, that I want
 to use SSL for POP3 and SMTP. Next I wanted to check configuration (by
 sending email from this mailbox to this mailbox) but it does not work.

 So I have opened telnet, connected via port 25 and writed ehlo
 hostname and then finded out, that there is missing STARTTLS. Is
 possible, that some bad configuration on client side (firewall,
 etc...) can cause this error including that this function is missing
 in printout of ehlo? POP3S working good.


Hi,

I have seen this kind of problem (STARTTLS not available for a single
client but working for everyone else) when the client is behind a
CISCO firewall with the FIXUP SMTP configuration option enabled.
Disable it using no fixup protocol smtp 25 on the firewall and try
again.

Regards,

Radu
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Re: [CentOS] Sendmail - STARTTLS not appear on one client

[Ralph Angenendt]

happymaster23 wrote:
 So I have opened telnet, connected via port 25 and writed ehlo
 hostname and then finded out, that there is missing STARTTLS. Is
 possible, that some bad configuration on client side (firewall,
 etc...) can cause this error including that this function is missing
 in printout of ehlo? 

Please *do not* show any configuration files when asking questions on a
mailing list. The bug hunters here will be unhappy if they get any hints on
what could be wrong in your setup.

 POP3S working good.

Yes, but that has nothing to do with sendmail. 

 From Sendmail log (/var/log/maillog):
 
 Nov 28 19:31:23 server sendmail[11163]: xxx:
 x.jizmorava.adsl-llu.static.bluetone.cz [85.207.xxx.211] did not
 issue MAIL/EXPN/VRFY/ETRN during connection to MTA

That doesn't have to do anything with the issue either.

Ralph

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