Comments on: SNDDST sending to some but not other email addresses http://itknowledgeexchange.techtarget.com/itanswers/snddst-sending-to-some-but-not-other-email-addresses/ Tue, 21 May 2013 15:58:36 +0000 hourly 1 By: ihdcsl http://itknowledgeexchange.techtarget.com/itanswers/snddst-sending-to-some-but-not-other-email-addresses/#comment-36804 ihdcsl Fri, 17 Mar 2006 04:25:37 +0000 #comment-36804 Hi there, thanks for your replies, they were invaluable in guiding me in my investigations.
On the basis that it might have been the domain address that was being kicked out by the Lotus Notes Server (I did not have much support from Media.com in order to attempt a Telnet handshake to establish whether this was happenning), I specified an alias SMTP address against the Iseries sender user profile directory entry dropping the host name so now the sender address looked like scheduler@domain.com rather than scheduler@as400.domain.com

This seemed to work fine.

Thanks again

IHDCSL

]]> By: pollywantsacracker http://itknowledgeexchange.techtarget.com/itanswers/snddst-sending-to-some-but-not-other-email-addresses/#comment-36805 pollywantsacracker Thu, 16 Mar 2006 10:18:38 +0000 #comment-36805 If media.com is receiving the mail (they can see domain name), then they are blocking it for some reason. On our mail server, we block for a wide variety of reasons but we can always tell why by looking in the maillog. We block on invalid domain names on the HELO. We block mail that has attachments with multiple groups of three letters separated by periods. But in any case, Lotus Notes must have a similar feature to look into the log and see what mail has arrived and why it might be blocked.

SMTP through SNDDST is kind of black art. Usually it just works and we go about our business. But, when there are problems, how to solve? Tough questions sometimes.

As to your questions..
1. Go CFGTCP, Work with TCP/IP host table entries. Find the IP of the AS400…Most likely one of the names shown is what is being used to send mail. In our case, mail from our iSeries comes from the server name that is the first fully quaulified name (serialnumber.company.com). That is the server that is sending the email. If you are sending the mail from as400@aaa.bbbb.com, that would be the “from address”. Our “from addresses” come out of the system directory. Find the user that is sending the email and WRKDIRE on that user. Do a change, look for F19=Change name for SMTP. Key in a valid user and domain.
2. I haven’t found a good way to trace an email. You can telnet to their mail server from your AS400 and manually type in the mail commands. Doing it this way will give you some feedback on why it may not work. Here is one such way to do this:
http://postmaster.aol.com/tools/telnet.html

Hope this helps.
as400doofus

]]> By: pollywantsacracker http://itknowledgeexchange.techtarget.com/itanswers/snddst-sending-to-some-but-not-other-email-addresses/#comment-36806 pollywantsacracker Thu, 16 Mar 2006 10:18:38 +0000 #comment-36806 If media.com is receiving the mail (they can see domain name), then they are blocking it for some reason. On our mail server, we block for a wide variety of reasons but we can always tell why by looking in the maillog. We block on invalid domain names on the HELO. We block mail that has attachments with multiple groups of three letters separated by periods. But in any case, Lotus Notes must have a similar feature to look into the log and see what mail has arrived and why it might be blocked.

SMTP through SNDDST is kind of black art. Usually it just works and we go about our business. But, when there are problems, how to solve? Tough questions sometimes.

As to your questions..
1. Go CFGTCP, Work with TCP/IP host table entries. Find the IP of the AS400…Most likely one of the names shown is what is being used to send mail. In our case, mail from our iSeries comes from the server name that is the first fully quaulified name (serialnumber.company.com). That is the server that is sending the email. If you are sending the mail from as400@aaa.bbbb.com, that would be the “from address”. Our “from addresses” come out of the system directory. Find the user that is sending the email and WRKDIRE on that user. Do a change, look for F19=Change name for SMTP. Key in a valid user and domain.
2. I haven’t found a good way to trace an email. You can telnet to their mail server from your AS400 and manually type in the mail commands. Doing it this way will give you some feedback on why it may not work. Here is one such way to do this:
http://postmaster.aol.com/tools/telnet.html

Hope this helps.
as400doofus

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