Dan Schaefer a écrit :
> One of my coworkers would like to send emails from her blackberry using
> the work mail server and her work address. Whenever she attempts to send
> a message, I get the following error messages in the mail log:
> Nov  4 13:28:35 pony postfix/smtpd[26853]: warning: 32.144.231.15:
> hostname mobile-032-144-231-015.mycingular.net verification failed: Name
> or service not known

that's an "informational" warning, nothing more.

> Nov  4 13:28:35 pony postfix/smtpd[26853]: connect from
> unknown[32.144.231.15]
> Nov  4 13:28:38 pony postfix/smtpd[26853]: disconnect from
> unknown[32.144.231.15]

for some reason, the client disconnected without attemtping to send mail.

> 
> This apparently is a DNS problem:

No. the DNS issue is just a warning. if you look at your logs, you'll
probably find that you receive mail from clients with reverse dns issues.

> [r...@pony ~]# host mobile-032-144-231-015.mycingular.net
> Host mobile-032-144-231-015.mycingular.net not found: 3(NXDOMAIN)
> 
> 
> I was wondering if errors like this could be ignored as long as her
> phone is setup to authenticate before sending messages?

By default, mail is accepted even if the client IP doesn't resolve.

time to reread the list welcome message, and provide infos about your
setup, ... etc.

note that your postfix and your client need to "agree" on tls &
authentication methods. if they disagree, your client will disconnect.

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