mail, php.ini on windows nt

[searain]

I am using mail() to mail out a message.

the platform is "Windows NT WSH1001 5.2 build 3790"

PHP version is PHP Version 4.3.4.

SMTP set up in php.ini is

"
Directive Local Value Master Value
sendmail_from [e-mail] [e-mail]
sendmail_path no value no value
serialize_precision 100 100
short_open_tag On On
SMTP 127.0.0.1 127.0.0.1
smtp_port 25 25 "

I cannot change this set up.

When I received message, I have two errors

1) "Sun-ONE-SMTP-Warning: Lines longer than SMTP allows found and truncated." This erro message is in my message source. And the e-mail was truncated. I solved it by add "\r\n" for every line.

But my qeustion is if the message contents is dynamically assigned, how could I know where I should insert this "\r\n" to make the new line before it is too long and be truncated?

2) the mail() function only works for sending e-mail to some e-mail accounts from some ISP, and not work for sending e-mail to some other e-mail accounts from a few other ISP, my guess is "sendmail_from [e-mail] [e-mail]" is not set up to a e-mail address, and then some ISP think it is SPAM and block it, am I right? Or any other possible reasons?

Thanks!

[visualAd]

You need to ensure that no line is greater than 2048 characters. You can use the chunk_split() function to do this.

[searain]

When I use mail() on Apache, there is no such line too long issue, why? It seems the lines were wrapped up automatically.

Also, what is wrong in the php.ini set up here that some of the ISP refuse to accept the e-mail from mail() on this machine.

Thanks!