On 05/05/16 14:40, Chris Smith wrote:
I configured Dovecot on our mail server under Centos 5.3 (I think) some while
ago now (about 2 years) and, to the best of my knowledge,it had been working
correctly all that time.
However, one of the team wanted to use webmail while away from base and found that,
although he could receive emails OK, he was unable to reply or send fresh emails.
When he pressed Send he got a message “Authentication failed" in a pop-up box.
He assured me that sending mail had been working and I was certain that I had
tested that aspect when I was setting Dovecot up, at least for local mail.
I tried to send email from my Dovecot account and had the same problem.
Our MTA is sendmail and that is not configured to authenticate on outgoing
mail, The configuration for sendmail hasn’t changed at least since the last
update in 16 March 2015 (sendmail 8.13.8-10.el5_11).
Dovecot uses php-5.5.5 in this set up.
The relevant entry in /var/log/maillog when I attempt to send an email from
Dovecot is:
May 5 16:34:29 firewall dovecot: auth: Debug: auth client connected (pid=13001)
May 5 16:34:29 firewall dovecot: auth: Debug: client in: AUTH 1 PLAIN
service=imap secured lip=127.0.0.1 rip=127.0.0.1 lport=143
rport=51861 resp=AGNocmlzADB1dFkwdUcwNDkh
May 5 16:34:29 firewall dovecot: auth: Debug: pam(chris,127.0.0.1): lookup
service=dovecot
May 5 16:34:29 firewall dovecot: auth: Debug: pam(chris,127.0.0.1): #1/1
style=1 msg=Password:
May 5 16:34:29 firewall dovecot: auth: Debug: client out: OK 1
user=chris
May 5 16:34:29 firewall dovecot: auth: Debug: master in: REQUEST
2607546369 13001 1 0bcf2e3a108cd9cd18eaff4b7de9c428
May 5 16:34:29 firewall dovecot: auth: Debug: passwd(chris,127.0.0.1): lookup
May 5 16:34:29 firewall dovecot: auth: Debug: master out: USER 2607546369
chris system_groups_user=chris uid=514 gid=100 home=/home/chris
May 5 16:34:29 firewall dovecot: imap-login: Login: user=<chris>,
method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=13002, secured
May 5 16:34:29 firewall dovecot: imap(chris): Disconnected: Logged out
bytes=11/334
May 5 16:34:29 firewall sendmail[13003]: u45FYTtd013003: localhost.localdomain
[127.0.0.1] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
Looks like a rainloop issue. Apparently it isn't speaking to sendmail
correctly.
The webmail server and our mail server are the same system. The firewall is
open for port 143.
It is only send from Dovecot that fails authentication, all other outgoing mail
is sent correctly.
Does anyone have any idea where else I can look for clues as to why there is
this behaviour?
Suplementary question: what does the “Sign me” check box on the webmail log in
page do?
Many thanks.
Chris
