I have encountered the same problem with my Macbook Pro 2012 whilst away on holidays.
Very interested in the responses that may come in. Regards John Thompson > On 27 Oct 2017, at 9:36 AM, Diana & Graham Stevens <diag...@iinet.net.au> > wrote: > > Good morning all > > Graham can't send emails from his POP account (no problem with incoming > mail). At first this fault was intermittent but for the last 2 days every > time he tried he got the same message "Can't connect to server ... enter > password" then "unable to verify ...". > > In preferences the SMTP password wasn't filled in with "optional" showing. If > I filled in the password I couldn't save it because only one SMTP server is > allowed. > > Because Graham needed to send an important email, I set up one of my email > addresses with his name and he sent it last night. > > This morning I sent a test message from his account and it went. When I > looked at the preferences for his account my email address is in the SMTP box > and the password is now filled in. Gremlins? > > I tried to change the SMTP to his account but got the same "only one allowed" > How can I fix this please. > > iMac (Retina 4K, 21.5-inch, 2017) 3.4 GHz Intel Core i5 OS 10.12.6 > > Diana > > Sent from my iPad > > > Sent from my iPad > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>