SNDDST sending to some but not other email addresses

25 pts.
Tags:
Application development
AS/400
CLP
Email
RPGLE
I am using the SNDDST command to to send an attachment of size 500 kb to a user in a particular domain say daydreamer@media.com I also ensure that an additional recipient is included and this recipient would be a private email address eg ihdcsl.hotmail.com I am receiving the email to the personal address but not by the media.com users Now Media.com have no problems receiving mail from other users and they certainly do not have a problem receiving mail from my outlook address. Media.com says that the domain that I am trying to send from has two dots in its domain i.e. AS400@aaaa.bbbbb.com They've not come across multiple dot domains before and suggest that this may be the reason why their Lotus notes servers are blocking the email (they have no proof that the server is indeed blocking it though). I need to know if it is possible to: 1. find out why there are 2 dots in the domain 2. put a trace on the email in order to see where the email packet is actually dissapearing. Bear in mind that I am not that familiar with email setup in the Iseries. Many Thanks

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Hi

I doubt very much that it would be anything to do with having two dots in the domain name. Think of all the companies out there that have two part TLD’s such as “.co.uk” for example, or blue chip companies such as Novartis that have the division in the email domain, e.g. “pharma.novartis.com”.

My question would be is the domain part of the address being given by the AS400 a valid domain. If it’s not then it could be that Lotus Notes is rejecting it as spam.

Hope it helps

Jonathan

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  • Pollywantsacracker
    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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  • Pollywantsacracker
    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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  • IHDCSL
    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
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