We are writing to inform you that AT&T - US is conducting a maintenance on their platform at the times specified below which will impact both SMS and MMS.
Type: Scheduled Maintenance
Start Time: 2020-05-27 04:00 UTC
End Time: 2020-05-27 11:00 UTC
Impact MT: Clients may experience delayed/rejected/failed short code MT towards AT&T
Impact MO: Clients may experience delayed/rejected/failed short code MO from towards AT&T
On behalf of AT&T - US we appreciate your patience and apologise for any inconvenience during this maintenance period.
If for any reason the maintenance is extended or cancelled we will advise you accordingly.
Please contact firstname.lastname@example.org
should you require further information or assistance.