Invalid mail address, must have a domain part [Err code: 501

[IMacD]

Hi Paddy

I have had the same problem too  but a different slant which may be helpful.

BT email does not recognise the email contacts (in my contacts) when I reply to an email - get the error message which says there is no domain. To start with I was able to delete the address that I was sending to and put it in again and it was fine as long as I was quick. The last two days it has got progressively worse.. What ever I do, it will not send when using the mobile signal when out - need to get back on wifi. Had been OK with my desktop but today will not send unless I do it really quickly before the autosave, I am now using my work email (gmail which is fine).

Keenly awaiting a solution.

[IMacD]

Have checked my contacts details - no comma's.  Had only one address that I was replying to. Suspect the autosave as the  one that I did send was a quick acknowledgement. 

Still have the problem with the autosave of word which is with the email team and not yet resolved.

[tryingtobepostive]

HI All - thanks for the support in trying to resolve this - I have looked at contacts and can't locate commas in them, it is possibly me looking properly!  

Either way I have found a good solution on my MAC desktop - I simply use mail from the IOS applications. It was easy to install my BT account and I won't need to use webmail at home.  Naturally when I start moving around the world again...webmail will be invaluable.  So hopefully it will be resolved eventually.

All the best

[Bp1Ransom]

Have the same problem.  Can send it from my phone . . . . but that's not very helpful 😞

[mac-101]

I am literally tearing my hair out.  BT email is sooooooo completely useless. I can no longer 'reply all' to various group emails plus a million other issues that have already been documented.  Please sort it out BT.  

[IMacD]

I sympathise as am in a similar position.  It has gone on for a couple of weeks. Why no update from BT?

[federicobazz]

Did the BT respond to the below complain and rectify the bug ? I had the same issue for the last few days .
Thanks

[tryingtobepostive]

Problem still occurring on webmail - but for now I am working around this - I had a call from BT yesterday. Just about to call them back - will be interesting to see what they say.  I will post any relevant news later

[rex003]

I'm as frustrated as hell. Everything has gone wrong since I was forced off BT Yahoo. Bt said they would call me back to help on code 501. I missed the call by struggling with call guard. I hold on 20 mins on average to speak to BT, they wait a nano second when they call me, and, I gave a mobile number as well.

My experience - receive an e mail, click reply, or reply all, error 501. Type the same addresses in, off it goes no 501. 

Compose e mail, enter name in address box, up comes the address, click send, error code 501. Type in same address, click send, off it goes.

I can't work like this BT. Please do something.

Rex

[DarrenW]

Hi All,

We have been testing and the comma inside of the contact name (not the email address) is causing problems when sending mail.

We have a script which will be ran shortly that should correct all email addresses that have contacts with the comma present.

I will post back once that script is complete so please do feedback when I do this. (FYI, users on this thread are on the list)

Note: I also suspect there is another problem when replying to an email address that is not a contact, it would be helpful if anyone experiencing this problem can supply a screenshot to me in a private message of either the error itself after pressing send, or the 'To:', 'Cc:' and 'Bcc' Fields.