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Welcome to another casualty in the war against spam. ISPs are starting to use various techniques to limit the use of their mail servers to only their clients.
Depending on what your ISP allows, you may be able to reconfigure. On the other hand, while it wasn't the last straw, it's one additional reason that my former ISP is my former ISP.
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The techniques ISPs use fall into a few buckets:
- They may only accept mail for sending if you are connected to their mail servers on their network. For example only if you are connected via the dialup or DSL connection that they provided you.
- They may only accept mail for sending if the "From" address is on a domain that the ISP hosts.
- They might intercept attempts to send mail through other mail servers, and redirect through their own - and them impose restrictions.
- They might require a separate login in order to send email.
There are probably other techniques in use as well.
I'm going to assume from the question that you can receive email on both accounts, so I'll limit myself to sending issues. With all those possibilities, and with all the possible ISP combinations, it's difficult to present The Answer. But I can at least go over a couple of things that I'd try.
The normal configuration might be to have each account send email using the SMTP server provided by that account's ISP - by that I mean your Verizon mail account will use Verizon's SMTP server, and the Comcast account would use the Comcast server. Instead, try configuring the problem account to use the other accounts SMTP server.
For many years sending email via SMTP required no authentication. Especially when you're connected via the ISP's provided lines such as dialup or broadband, that was enough to "authenticate" that you are authorized to use the ISP's servers. Many still operate that way by default but impose some simple restrictions such as requiring that the "from" address be something that the ISP controls. Quite often the ISP will lift restrictions as long as SMTP authorization has been successfully used. Try configuring the account that's not working to use authentication - either "same as receiving account", if that's an option, or with explicit account/password information.
And it's even worth combining those two approaches: try sending using the "other" accounts mail server, and try adding authentication to that configuration as well.
If efforts so far have been unsuccessful, it might be worth asking one of your ISPs if they even support what you are doing. Some might allow you to send using a different port - something other than the SMTP standard port 25 - or they might have alternate approaches. Or they might not help at all, and you'll know it's time to find another ISP.
Article C2523 - January 17, 2006
i cannot send email-i can forward, reply, etc-i just cant send email-this is the 2nd day
Posted by: amanda richardson at September 11, 2009 8:51 AMThis "improvement" has cost me access to my accounts and is in no way an improvement for me. I hate it and want my accounts reestablished or I am out of here. Do not fix things without notifying members that you are doing so. That is bull..... And making it harder to reestablish these accounts is ludicris at best. Thanks for nothing! I am not savvy enough to do the things you suggested and why should I have to? You screwed it up, now fix it!
17-Nov-2009
Posted by: judi fermanich at November 16, 2009 9:11 AM
If you are traveling, a lot of times the ISP will only allow access to their own SMTP servers, but you may not know what those SMTP servers are. The best solution is to have an authenticated 3rd-party SMTP server that allows you to send email from any ISP on an alternate port (for example port 587). A good service like that is bortnet.com.
Posted by: Larry Larson at February 28, 2010 4:11 PMcan't send e-mail from my account,,i receive but i can't write text,,,or reply,,,thanks
Posted by: djamal at March 16, 2010 5:02 AMi cant send any mail since one week
Posted by: suraj at March 18, 2010 9:57 PM