cannot send email - undeliverable

[2Goldies]

return system admnistrator - undeliverable

recpient cannot be reached:

453 4.1.1 w04bsNLDrFiJG Too many Recipients (TT502)

I can send email from my talk talk webmail account but not from any of my devices.

I have checked settings and all seem ok. 

Help please anyone?

[2Goldies]

Yes and yes.  I rang technical yesterday for advice and it has been progressed to case manager/service management team.  I have been advised that someone will ring me within 3 days.

I've checked today and can now send an email from my mac and iphone but am still wary that my email address has been compromised.

J

[Ady-TalkTalk]

Hi 2Goldies, do you have an active TalkTalk account that you're paying for and if you do is the mailbox linked to said account?

Ady