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Sending smtp mail

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Sending smtp mail

I noticed that port 25 is blocked.  I was told to use port 587.  What is the address & credentials that I should use, to get my mail out? 

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Re: Sending smtp mail

New Poster

Re: Sending smtp mail

I have that info, but can not get it setup.  I followed this: https://pbxinaflash.com/community/threads/how-to-use-smtp-smarthost.8936/#post-55189.  This is the error that I got in response: 

May 12 17:42:37 server sm-mta[9425]: w4CNeY7X009423: w4CNgb7X009425: DSN: Service unavailable
May 12 17:42:37 server sm-mta[9425]: w4CNgb7X009425: to=<email@email.com>, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30000, relay=smtp.comcast.net, dsn=5.0.0, stat=Service unavailable
May 12 17:42:37 server sm-mta[9425]: w4CNgb7X009425: w4CNgb7Y009425: return to sender: Service unavailable

I am using sendmail on a Linux host to send mail.

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