Only on Outbound emails I get the following error. Just started yesterday. I've checked all the settings, etc. and everything is right. Can't figure it out. Can anybody help? An error occurred while sending mail. The mail server responded: 5.2.0 3Ton1x0010PnBoL01TonSu internal error. Please check the message and try again. Tina

Hi, please review this link: www.cox.com/secureemail to see if that corrects your issue. If it doesn't, send us a message on Facebook, Twitter or email us at cox.help@cox.com for additional assistance. We're here to help! Thanks,

CarolLM - I did that already. I read and did everything I can think of. My settings are okay and I can send thru gmail. But if I try to send to a large number of people using my Cox email it won't send and I get that server error message each time. I used to be able to do this and now can't. It's not my email client if I can send thru gmail. It's a problem with Cox. Any other suggestions?

I have the same problem. "Brian from Cox" had a post on this and I did everything the post stated - on Changing your e-mail server settings for Microsoft Outlook 2007-2016 (I have 2007) and it worked one time. After that it started giving me an error message that "Relaying not allowed" to any recipient. After several more tries it gives me an error message of "too many bad command" - it also gave me message one other time to the effect that the sever does not accept encrypted messages. This all started when cox made a change to the encryption settings. Is there any plan to fix this?

I have the same problem. I called Cox support today and after searching for awhile, the technician confirmed internal documentation that Cox now has a email sending limit of LESS THAN 10 email recipients. Otherwise you get that error message. This is all new within the last week. Cox, how about changing that error message to something informative such as "Error. maximum of 9 email recipients allowed." Of course this is ridiculous. Users can't send out emails to nearby neighbors, boy scout members, church choir members, etc. How would Cox even send emails to their own tech support department employees? I'm sure there are more than 9!

Cox has sending limits in place for outbound email. These limits are intended to reduce the amount of unwanted spam on the Internet by identifying and containing “spam bot” attacks generated from Cox customers’ PCs. These limits are set very high, and it is unlikely that normal residential mailings will surpass the limits. Cox has chosen sending limits based on other ISP’s best practices and analysis of existing email traffic to insure even large legitimate residential mailings complete with no errors. Please resend your message using Cox Webmail instead of your current email utility (https://myemail.cox.net). I successfully sent an email to 10 recipients this morning using my Cox Webmail account.

EMAIL ERROR | Cox Community

47 Replies

CarolLM
Former Moderator
Hi, please review this link: www.cox.com/secureemail to see if that corrects your issue. If it doesn't, send us a message on Facebook, Twitter or email us at cox.help@cox.com for additional assistance. We're here to help! Thanks,
TinaV
New Contributor
CarolLM - I did that already. I read and did everything I can think of. My settings are okay and I can send thru gmail. But if I try to send to a large number of people using my Cox email it won't send and I get that server error message each time. I used to be able to do this and now can't. It's not my email client if I can send thru gmail. It's a problem with Cox.

Any other suggestions?
jannymv
New Contributor
I have the same problem. "Brian from Cox" had a post on this and I did everything the post stated - on Changing your e-mail server settings for Microsoft Outlook 2007-2016 (I have 2007) and it worked one time. After that it started giving me an error message that "Relaying not allowed" to any recipient. After several more tries it gives me an error message of "too many bad command" - it also gave me message one other time to the effect that the sever does not accept encrypted messages. This all started when cox made a change to the encryption settings. Is there any plan to fix this?
John2222
Contributor
I have the same problem. I called Cox support today and after searching for awhile, the technician confirmed internal documentation that Cox now has a email sending limit of LESS THAN 10 email recipients. Otherwise you get that error message. This is all new within the last week.

Cox, how about changing that error message to something informative such as "Error. maximum of 9 email recipients allowed."

Of course this is ridiculous. Users can't send out emails to nearby neighbors, boy scout members, church choir members, etc. How would Cox even send emails to their own tech support department employees? I'm sure there are more than 9!
Becky
Moderator
Cox has sending limits in place for outbound email. These limits are intended to reduce the amount of unwanted spam on the Internet by identifying and containing “spam bot” attacks generated from Cox customers’ PCs. These limits are set very high, and it is unlikely that normal residential mailings will surpass the limits. Cox has chosen sending limits based on other ISP’s best practices and analysis of existing email traffic to insure even large legitimate residential mailings complete with no errors.

Please resend your message using Cox Webmail instead of your current email utility (https://myemail.cox.net). I successfully sent an email to 10 recipients this morning using my Cox Webmail account.
TinaV
New Contributor
This is utterly ridiculous! Limiting emails to 10 addressees is not feasible. I run a sports organization and am on the board of another organization and routinely send group/mass emails to coaches, staff, families, etc. and addressees are anywhere from 5 to over 200 people. I've always been able to do this until a few days ago!

Nice that Cox doesn't even inform people of changes. Reinforces my strong dislike of Cox - from their cable services to now email. Need to start looking for another provider. Almost all my friends no longer use Cox. Now I know why.

There has to be a resolution to this.

Tina
TinaV
New Contributor
Becky - Insane! Completely understand spam controls, etc. but a lot of people routinely send to large groups of people for legitimate reasons. For example - I run a youth sports organization that has over 250 kids and over 75 coaches. I routinely send emails to those families and coaches.

Sending by Webmail is not great as you have to type in each email address and I don't have the time to do that for 200 plus some addresses. In my email client I can copy a list from an excel file and paste it into the To block in seconds instead of typing each email.

There has to be a way around this. Please advise.

Tina
John2222
Contributor
Becky, please check with Alex (Cox support rep) from Sunday afternoon, look up my ticket and confirm (or not) what he told me about email limits and Cox internal documentation for residential customers now in effect.

I am using Outlook 2016 (Office 365) with Windows 10. Every Sunday I send a church announcement to about 30 members. It's been working fine for years. Yesterday, I received the bounce error message " ... 552 5.2.0 ... internal error" for each intended recipient.

During my own testing I reduced the email to 15 email recipients (same error), then 10 (same error) and then finally 9 (no error). Finally I broke the message into multiple "groups" of 9 each and succeeded in sending my original 30 members the email.

My security settings are correct and match Cox's recent changes.

It's not realistic to require customers to use your online Webmail app or export all my address book to it. Outlook 2016 is widely used and respected email "utility" with many features.
jannymv
New Contributor
I agree wholeheartedly - as of now I can't even log on to the outgoing e-mail server - even though all my settings match what Cox says - they're answer to use their webmail is absolutely ridiculous.
jannymv
New Contributor
What an absolutely ridiculous reply from Cox!