My guess is that you have both maine.rr accounts trying to use the same SMTP server. You can check that by clicking 'account settings' and scrolling down to 'Outgoing servers SMTP' and clicking the link. You should see five SMTP server settings, one for each account. For the two for maine.rr, change the DESCRIPTION field to contain the full email address for the accounts. THEN, click account settings , then click the account name in left side and then look at bottom line in right pane. you should see the email address for that account in the outgoing server field. if not, click the dropdown there and select the proper one.

David, this 84 yr old, poor tech savvy citizen with bad memory retention thanks you for reply & help. Not sure all the info requested at "change the DESCRIPTION" as to exactly what the full email addresses included. Did note that the Google accounts used "smtp" and the RoadRunner (RR) did not...and, if i needed to include my addresses. Did try adding "smtp" to the RR address, but not work and spent too much time changing back. Did go to the "THEN click account settings again and found at the "botttom line" that one Google account said "smtp.gmail.com (DEFAULT)...and, after looking at each email line it was the only one. I also looked at the "edit" tab for each address and all showed "default" on the "port:" line with the RR's showing port#587 and the Gmails showing port# 465. Looks to me that the Default is the problem, but do not know if undo is correct or how to do it. Any additional advice? Again, many thanks for your help and reply. Doug Erskine