Public bug reported:
Hello,
I spent the better part of the morning trying to get the Ubuntu sendmail
package to use a 2048 DH parameters file created like this so that it
could send email to hosts that have fixed logjam already...
openssl dhparam -out /etc/mail/tls/dhparams.pem 2048
changed sendmail.mc to define(`confDH_PARAMETERS',
`/etc/mail/tls/dhparams.pem')dnl
make
in sendmail.cf it says O DHParameters=/etc/mail/tls/dhparams.pem
but no matter what I do sendmail doesn't use the new DH Parameters file.
It keeps giving this error
Sep 9 10:11:06 d3 sm-mta[10012]: STARTTLS=client, error: connect failed=-1,
SSL_error=1, errno=0, retry=-1
Sep 9 10:11:06 d3 sm-mta[10012]: STARTTLS=client: 10012:error:14082174:SSL
routines:SSL3_CHECK_CERT_AND_ALGORITHM:dh key too small:s3_clnt.c:3339:
** Affects: sendmail (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1493922
Title:
sendmail package does not support strong DH/TLS
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