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1. Mozilla thunderbird email settings on cox.net full#
2. Mozilla thunderbird email settings on cox.net software#
3. Mozilla thunderbird email settings on cox.net plus#

SBC Yahoo customers can also look at " Why am I unable to send email." on the SBC site for more solutions. (For, the fix is to change port to 26.)Īlternatively, your ISP might agree to unblock port 25 for you on request. RFC 2476 explains why this works for newer SMTP servers. In Thunderbird's "Outgoing Mail Server" panel, replace the default 25 with 587. The usual fix is simple but may not work for all servers. Comcast drops it because it was addressed to port 25 but not to Comcast's SMTP server.

Either you get an error message, or the mail simply vanishes. Now take the laptop home and try sending mail. When you test sending e-mail, it works, because you're not subject to Comcast rules on your company's network. Say you configure your laptop's Thunderbird's "Outgoing Mail Server" to use port 25. In an effort to stop spam, many ISPs (Comcast, Cox, many others) block all traffic to port 25 on anything except their own SMTP servers. See POP before SMTP support for further information. Some e-mail service providers require that you check for new messages before you can send messages. If you see "Relay access denied" or "Relaying denied" errors, be sure to verify this setting.

Mozilla thunderbird email settings on cox.net full#

Also, your username (if needed) might be your full e-mail address (e.g., or only the part before the ("johndoe"), depending on your service provider check with them which is correct. If you receive error messages when trying to send, try unchecking this box. Use name and password: Check this box if your e-mail service provider supports or requires SMTP authentication.If you're having problems, ask them which ports they support for SMTP or outgoing e-mail. Port: Some service providers use non-standard ports (25 is standard).Verify the settings in Thunderbird exactly match what your ISP provides: no typos (e.g., "smpt"), extra spaces, punctuation mistakes (e.g., no commas instead of periods) or capitalization errors (e.g., lowercase instead of Caps).Ĭlick "Tools -> Account Settings -> Outgoing Server (SMTP)" (at the bottom of the left pane-you may need to scroll down), and double-check:

Mozilla thunderbird email settings on cox.net plus#

And stop attaching a signature.įirst, get the correct outgoing mail (SMTP) settings from your service provider, usually your Internet Service Provider (ISP): try their website, search Google for your ISP plus the word "smtp", or call them. If your e-mail system has been stable and working for a long time, then suddenly doesn't send, suspect your ISP.

Mozilla thunderbird email settings on cox.net software#

The ISP antispam/virus software thinks it is a spammer attachment, and your outgoing mail disappears forever. One example of an item being blocked is the word 'geocities' - not in your mail but in your signature attachment. If that sends OK, then the problem could be this. Test for this by using your browser and logging into your ISPs webmail system (if they have one) and send an e-mail using the webmail. If you have any suspicious objects in your mail, the e-mail will leave your machine fine, but won't even reach their mail-server. In 20, some ISPs introduced new mail filtering before it reaches their mail-server. If you recently upgraded Thunderbird, verify that the firewall is not blocking the new version. Please check the antivirus settings again. If you are migrating from a previous email client, your previous email client might be able to send out email even with port 25 blocked by anti virus software. Some antivirus software (Network Assoc Viruscan) blocks port 25 to prevent mass emailing worms from sending out email. If your anti-virus program is scanning outgoing messages disable that feature (its okay to have it scan incoming messages). Sometimes those settings work fine with fetching mail but not sending mail. However, many firewalls/security suites have threat level settings. With a classic firewall its simply a question of whether or not you have a rule that states the application is allowed to connect to the Internet, and does the rule know about the current version of the Thunderbird executable. Verify that your firewall or antivirus program is not blocking Thunderbird.