On a number of occasions e-mails that I am sending have been blocked. The latest this morning was returned with the following message - SMTP error from remote server for GREETING command, host: mx.talktalk.net (62.24.202.42) reason: 554 cm7nec mx.talktalk.net XPOJb2tPrQUFi IP Blacklisted (TT102)
This is happening too frequently and is grossly inconvenient.. I have read that it might be a security issue because I use multiple devices. Is there a solution please