Re: SMTP Problem

Subject: Re: SMTP Problem

From: David Haines <email@hidden>

Date: Fri, 24 Jul 2009 11:30:18 -0400

Delivered-to: email@hidden

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On Jul 24, 2009, at 4:55 AM, Perttu Aaltonen wrote:

On Jul 22, 2009, at 4:39 PM, Robert Everson wrote:

Here is the issue I'm having, that I can't seem to get my head wrapped around, as it only happens to one user.

When this user sends an email from their computer at work, everything works fine, and if they take that computer to Panera, or any other WiFi hot spot, everything also works fine.

However, when they take their computer home, they are unable to send messages. At first I thought it would be their ISP blocking SMTP, but I do see the messages getting to our server. I checked our junkadmin account, and I see their messages are getting flagged as SPAM.

You could add another smtpd process listening on another port to your master.cf that bypasses the content filter, only accepts authenticated clients and rejects everything else. Of course then you would have to change smtp port in every client application that needs to bypass content filtering. If you only need to change one client then this should be simpler than configuring complex rules and restrictions to make it work on the standard port.

There are several methods outlined in the document I already provided a link to,

On Jul 23, 2009, at 1:22 PM, David Haines wrote:

Some potential options:
http://www200.pair.com/mecham/spam/bypassing.html

and if you use the standard submission port I believe Mail (in 10.5) will auto-discover the port.

From http://mac007.com/?Tips:Alternate_SMTP_Ports (currently down or gone),

In /etc/postfix/master.cf , (note, this is requiring SSL (TLS) ):

# Enable SMTP-TLS on port 587 with specified options

587 inet n - n - - smtpd

-o smtpd_client_restrictions=

-o smtpd_recipient_restrictions=permit_sasl_authenticated,reject

-o content_filter=

-o smtpd_enforce_tls=yes

# Enables SMTPS on port 465 with specified options.

# This works well with Outlook 2003

465 inet n - n - - smtpd

-o smtpd_tls_wrappermode=yes

-o smtpd_client_restrictions=

-o smtpd_recipient_restrictions=permit_sasl_authenticated,reject

-o content_filter=

After saving, from Terminal, issue:

sudo postfix reload

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References:

>SMTP Problem (From: Robert Everson <email@hidden>)

>Re: SMTP Problem (From: David Haines <email@hidden>)

>Re: SMTP Problem (From: Robert Everson <email@hidden>)

>Re: SMTP Problem (From: jeff donovan <email@hidden>)

>Re: SMTP Problem (From: "Perttu Aaltonen" <email@hidden>)